Benz E200 check engine light, idle when the engine vibration, slow speed

Symptom
A Mercedes E200 configuration 271EVO engine and 722.9 transmission, mileage of 131670km. The car to replace the oil filter base, 4 days after the engine fault light, and idle engine jitter, the vehicle speed slow.xtool x100 pro

Troubleshooting and troubleshooting
The car replaced the oil filter base, disassembled the intake manifold, according to the initial phenomenon of the fault to determine the following reasons: the intake system in a vacuum tube leak or not installed in place; intake manifold leak ; Throttle does not match well, or is not installed in place; ignition problem; xtool ez500 oil supply problem.

Because the car did not change the maintenance of the spark plug, VVDI MB Tool and the last into the store to check the spark plug attached to a lot of coke, and the phenomenon of burning the electrode, first with a new spark plug installed, the car after the engine or jitter. There is no problem with the spark plug connected to the diagnosis of the spark plug. Read the fault code: P0172 mixture (cylinder column 1) is too thick, the signal amplitude is greater than the maximum amplitude. The meaning of the fault code is the mixture is too thick, resulting in mixed gas is too thick because the main reason is too much fuel injection, too little intake or burning is not good. Follow the fault code to guide the actual value of the engine under idling conditions.VVDI Key Tool


The actual value of the rail pressure is 5440kPa (marked value is 4540 ~ 6540kPa), which will remove the problem of high pressure pump. Throttle downstream pressure sensor pressure value of 48.266kPa (standard value of 20 ~ 40kPa), the signal voltage is 1.0V (standard value is 0.5 ~ 0.7V). There are two reasons for its actual value: the sensor and its line problems; air intake system in a part of the leak. According to the circuit diagram to measure the sensor supply voltage of 5V, ground and signal lines are normal. Throttle upstream pressure sensor and the downstream pressure sensor, the two sensors are interchangeable, the actual value of the sensor is still incorrect, indicating that the sensor and its line is no problem. Next check the air intake system where there is no leakage,VVDI Key Tool.

In the first easy after the difficult principle, first check the intake system of each vacuum tube with or without leakage of the place, and then check the throttle, remove the throttle to see the seal is not damaged and crushed place, flap is not issued card , To save the throttle again after the replacement, with a diagnostic instrument to re-learn, taking into account the E-class 212 models in the diagnostic test when the voltage requirements are more stringent, when the battery voltage is lower than 11.6V when some of the elements of learning And the match may not succeed. Connected to the battery charger on the throttle to relearn, start the vehicle, the fault remains the same, remove the throttle problem,VVDI MB Tool. Then focus on checking the intake manifold, remove the intake manifold to see its seal is intact, no abnormalities, but also in the seal on the sealant, and then installed in accordance with the standard torque intake manifold. Start the car, the engine or jitter, throttle downstream pressure sensor actual value is not normal. Re-order ideas, starting from the air intake step by step careful investigation, see whether the missing part. When the rear of the air filter to check the intake pipe, found that as long as the pull out of the intake pipe connected to the secondary air jet pump hose (below),MB SD C4 the engine does not shake, and the actual value of the throttle downstream pressure sensor Also fell to the normal range. Put the handle near the hose, can obviously feel the warm air blowing, smell like the exhaust gas from the cylinder.



This tube is the secondary air jet pump inlet pipe, the secondary air jet pump is usually only in the coolant temperature between 10 ~ 60 ℃, the engine speed is less than 3000r / min, the engine is idle or part of the load. The secondary air jet pump draws fresh air from here and then switches the vacuum control secondary air injection valve from the intake manifold by the air pump changeover valve (Y32). The fresh air enters the row of the cylinder head with the secondary air injection valve Gas and exhaust gas to react, so that the three-way catalytic converter as soon as possible to achieve the working temperature, thus improving the warm-up process of emission performance. According to the working principle of the secondary air injection system, this tube should not be blown out of the air. There are two reasons for this phenomenon: the air pump switching valve (Y32) is always in the normally open state, the air pump switching valve (Y32) has been through the vacuum to open the secondary air injection valve; secondary air injection valve stuck, Open the state. Through the diagnostic device to observe the actual value of the air pump switch valve, has been in a closed state, and then through the diagnostic instrument to activate the open, close are normal, the exclusion is the air pump switch valve (Y32) problem. The following left the second air injection valve, and remove the secondary air injection valve and open and found the diaphragm was coke locked, can not be closed.



Since the secondary air injection valve can not be completely closed, the exhaust gas is returned to the intake pipe through the piping of the secondary air injection system so that the pressure of the intake manifold is increased and the exhaust gas is then introduced into the cylinder.

Because the entry of the exhaust gas, relatively fresh air will be reduced, so that fuel can not be fully burned, air-fuel ratio is not right, the engine jitter and reported mixed gas too thick fault. The secondary air injection valve carbon deposition clean, re-installed back, the engine running smoothly, the problem solved.

The next morning to wash the car ready to pick up the goods, start the vehicle and found the vehicle just off the car immediately, and then start the second time, start time is too long, but after the start of the engine running very smoothly. Then start a few times, everything is normal. Stopped a dozen minutes to start again, the failure appeared. And then use a multimeter to measure the starting voltage of 10V, normal. The low pressure of the fuel system is measured at about 500 kPa (standard value 400 to 670 kPa). Connect the diagnostic device, analyze the actual value of the engine at startup, found that the actual value of the downstream pressure sensor is not normal, its value is 38.6kPa
(Standard value is 20 ~ 40kPa), close to the critical value. Will be the second air pump inlet hose unplugged and found a blown air, turn off after ten minutes and then start the vehicle again, everything is normal. Again remove the secondary air injection valve and find that the diaphragm is jammed again. Remove the coke after careful observation, the diaphragm has been deformed, off lax, it is easy to be coke locked.

Replace the new secondary air injection valve after troubleshooting.

Fault summary
In the troubleshooting, we must comprehensively, CGDI MB Benz comprehensively and systematically consider, master the working principle of the engine system, according to the working principle of the possible parts of the failure to exclude one by one, careful analysis of the various failures and the actual value is very important Can help us find ideas and found that difficult to find the point of failure.

How to diagnose and solve Auto Cylinder Leak

Cylinder leak detection using the cylinder leak detector.The basic principle of the test is to use the compressed air filled into the cylinder, with a pressure gauge to detect the piston at the end of the compression at the end of the cylinder when the Yanhua DR-Key adapter pressure changes, to characterize the entire cylinder group of OBD2 sealing.That is, not only the seal of the piston piston friction, but also to characterize the intake and exhaust valve, cylinder liner, cylinder head and cylinder seal.

 (1) cylinder leak detector structure and working principleDomestic QLY-1 type cylinder leak detection Diagspeed MB Key device mainly by the pressure reducing valve, intake pressure gauge, measuring table, calibration orifice, rubber hose, quick change pipe fittings and inflatable mouth and other components, as shown in Figure 2-12 The In addition, there must be an external air supply, a pointer to the piston position and a piston positioning plate.The pressure of the external air supply should be equivalent to the cylinder compression pressure, generally should be 600 ~ 900kPa. Compressed air according to the direction of the arrow into the cylinder leak detector, the pressure from the intake pressure gauge display.

WithAfter which it enters the cylinder at the end of the compression end through the pressure reducing valve，Fcar FVCI Passthru tool the calibration orifice plate, the rubber hose, the quick change pipe fitting, and the inflatable nozzle. The pressure change in the cylinder is shown by the gauge. The pressure changesThe condition indicates the seal of the cylinder block.Cylinder Leakage Diagnostic Parameter StandardFor the cylinder leak, China has not developed a unified diagnostic parameters. Auto Repair

QLY-1 Cylinder Air Leakage Detector In the instruction manual, for the engine of the domestic truck, when the inlet, the exhaust valve and the cylinder liner are well sealed, the cylinder seal condition (mainly refers to the cylinder piston) Judgments can be dealt with in Table 2-6. When the meter reading is greater than 250kPa,Cylinder piston with sub-sealing conditions meet the requirements, the engine can continue to use; when the meter reading is less than 250kPa, the cylinder plug with the deputy seal does not meet the requirements of the engine cylinder to be ring or boring cylinder. Transportation industry standard JT / T201-1995 "vehicle maintenance process specifications" in the vehicle before the second maintenance of the use of the reference diagnostic parameters of the standard requirements of domestic Dongfeng EQ1090 and the liberation of CA1091 car cylinder leak, When the cylinder piston is placed in the static compression top dead center position, the measured gauge pressure should be ≥ 250kPa.

What Is Auto Immobolizer System?

Car theft system refers to the system that prevents the car itself or the items on the car from being stolen. It consists of electronically controlled remote control or key, electronic control circuit,CGDI Prog alarm device and the implementation of institutions and other components.  

The earliest car door lock is a mechanical door lock, only for car driving to prevent the door automatically open and accident, only the safety of traffic, can not afford the anti-theft effect. With the progress of society, the development of science and technology  SKP1000 Programmer and the increasing number of cars, and later the manufacture of cars, trucks doors are equipped with a key lock. The door locks only one door, and the other door is opened or locked by the door lock on the door VVDI Key Tool

In order to better play the role of anti-theft, and some cars also equipped with a steering lock. The steering lock is used to lock the steering wheel of the car. The steering lock is locked with the ignition and is installed under the steering wheel, which is controlled by the key X431.

 That is, the ignition lock cut off the ignition circuit to turn off the engine, the ignition key and then left to the extreme position of the gear, the latch will be extended into the steering shaft slot, the car steering shaft mechanical lock. Even if someone will open the door and start the engine illegally, because the steering wheel is locked, the car can not be turned, it can not drive away, so played a car anti-theft effect Fcar F3-G. 

 Some cars are designed and manufactured without a steering lock, but with another so-called crutches lock the steering wheel, so that the steering wheel can not turn, but also can play an anti-theft effect. Some cars in the transmission with a mechanical lock, the transmission lever is locked, so that the theft can not be linked to the car can not move. Ignition switch is used to turn on or off the engine ignition system circuit, according to a key to open a lock of the truth, but also played a certain anti-theft effect. As the car technology continues to develop, most cars are installed on the central door locks, that is, the car door locks and luggage compartment lock to achieve centralized control.

Magenta Pump Leakage Coolant Failure Case

Vehicle Information
Model: MAGOTAN 1.8T

Symptom:

MAGOTAN 1.8T new car more than 4,000 kilometers of water pump leakage of coolant, replace the pump after driving more than 1,000 kilometers, the pump once again leak antifreeze.Launch X431 Tool


Fault analysis and maintenance process Vpecker E4
1. When the vehicle travels 4011km, the station checks the leakage antifreeze. After checking the water tank, it leaks the antifreeze, removes the water pump and finds that the temperature inside the side outlet of the thermostat is damaged.Fcar F502
2. Replace the pump after the vehicle and travel about 1000km, once again complained about the antifreeze and leakage, check or water leakage at the pump antifreeze. Remove the pump to find the pump or in the side of the thermostat side of the outlet is damaged, the damage is the same as the first, (as shown below)
Professional DPF+EGR Remover 3.0
3. Because this vehicle is a new car and the damage location of the two pumps is roughly the same, analysis and pump quality problems caused by the probability is not that there should be other aspects of the problem, resulting in a series of damage to the pump.OBDSTAR TP50


On the form of damage to the pump, there are several possibilities:


1, the quality of the pump itself is a problem
2, the installation location of the pump problem
3, the installation of the pump cylinder surface protruding
4, there are external forces lead
4 because the water has been continuously damaged two pumps, analysis of the pump itself is unlikely to cause the problem; the new pump smear sealant, check the location of the pump installation; the engine block and the pump surface of the flatness of the inspection, Check the flatness normal.

5. In the process of inspection SBB Key Programmer found in the 2-cylinder, 3-cylinder injector at the bottom of a large number of yellow gasoline residue traces (as shown below), combined with the customer response sometimes in the cab can smell the smell of gasoline. Analysis of the traces should be leaking out of the gasoline traces, but the leakage of gasoline and water pump damage is it?



6. Further inspection VVDI found that the pump seal some swelling (see below), originally thought that the pump shell damage after the shell elongated, and now look at the petrol bedroom seal, resulting in swelling, and thus bulging the shell Body, causing leakage.


7. From the oil point of view 2 cylinder 3 cylinder position traces of gasoline traces more serious, remove the 2 cylinder, 3 cylinder nozzle, can be observed in the 3-cylinder fuel injector plug with gasoline, the surface of the gasoline flow trace. To determine the fault is caused by the 2-cylinder, 3-cylinder injector oil spill. The results replaced the 2-cylinder, 3-cylinder injector, and replaced the 1-cylinder, 4-cylinder nozzle seal.

8. After the vehicle is shipped, it is tracked, the next day the customer feedback feels good. And after a few days of customer feedback, in the cab and smell the smell of gasoline. Immediately about customers to check.skp900 programmer

9. Vehicles came to the service station, open the engine compartment, you can smell the smell of gasoline. Because the car's fuel injector installed in the lower part of the inlet, the eyes can not look directly to, in order to be able to accurately find the leakage point, learn the first two training lessons, in no hurry to disassemble and repair. The engine was in a state of fire, carefully observed in the bottom of the 4-cylinder injector formed gasoline droplets, check found in the top of the 4-cylinder injector, from the rails to leaking gasoline.


10. After removing the rails, observe that the guide rail has a vertical groove at the installation of the 4-cylinder injector. Sealed the place, put the rails up, into the gasoline, after a period of time, can be observed from the vertical at the vertical leakage of gasoline. (Pictured)


Failure analysis:

Because the 4-cylinder fuel rails have cracks, resulting in gasoline leakage, leaking out of the gasoline gradually immersed in the pump seal, the ring erosion swelling, resulting in damage to the pump, leakage antifreeze,


Troubleshooting:

Replacement of oil rails and pumps


Special tools / equipment: T10133 torque wrench VAS6150B OBD2


Maintenance Summary:

Water pump leakage is a more common fault, but the new car in the short term continuous damage we first met. The second maintenance, although checked out of the gasoline leak, led to the pump seal inflated, but did not find the root cause of the problem. On the one hand is the main location of the fuel injector installed in the lower part of the inlet, the naked eye can not be observed; the other hand, our inspection work is not enough detail. Need to sum up lessons learned. Do a good job of technical work, to study the investigation, root cause.

Automobile Power System Key working principle

The electrical power used in automotive electrical equipment is a DC power source, which comes from batteries or generators. The electrical system, which is connected by batteries, generators, regulators, charging status indicating devices, switches and wires, is called a power supply system (referred to as a power supply system).UCANDAS VDM2

The work of the automotive power systemThe battery and the generator in the MB SD Connect C4 power supply system are working in parallel. When the engine is in normal operation, the generator is powered by the generator and charged to the battery. At the time of starting, the battery supplies power to the starter. As the generator is driven by the engine through the drive rotation, when the engine speed changes, the generator output voltage will change. To meet the requirements of automotive electrical VAS5054A equipment and battery charging constant voltage, the power system are set within the voltage regulator to ensure that the generator output voltage stability in a certain range, to prevent the voltage fluctuation is too large and burn the electrical equipment. The charging state indicating means indicates the charge / discharge condition of the battery.

The layout of automotive power systems   VVDI2
At present, the power system on the car can be divided into 12V power system and 24V power system, and the general use of alternator and electronic regulator.Key Programmer
According to the electronic regulator installed in different ways, the power system layout can be divided into separate and integral two.key cutting machine
The distinctive features of the integral alternator power supply system are:
There is no longer a wire connection between the alternator and the voltage regulator. The system line is greatly simplified and the failure rate is greatly reduced. But the system failure can not quickly diagnose the failure of the car parts
CK100 Key Programmer
In recent years, with the people riding comfort, fuel economy, environmental protection requirements of the increasing, new electrical installations in the car has been widely used, the proportion of automotive electronic accessories increased significantly, such as a variety of Electronic control system (electronic control jet, electronic control automatic transmission, electronic control suspension), cruise control, car computer network.Diatronik OBD Tool

Some electromagnetic or electric actuators have also gradually replaced the hydraulic drive and pneumatic actuator, which greatly increases the load on the electrical system, which requires the car's power system to provide higher power.
http://www.car-auto-repair.com/

Launch X431 iCarScan and Vepcker Easydiag Test Report

Launch iScan accept a lot added options on that car again vpecker, for archetype on engine it can alone Launch X431 Diagun IV apprehend few ambit and it can apprehend and bright agitation codes thats it annihilation abroad on engine not even dpf regeneration, idiag accept added to action for that car, i activated on few added cars. I anticipate what it can do added with appropriate functions is for Toyota,Honda,Scion. But back it is aboriginal interface and software amount is ok for it (cost $210).Launch X431 Pro3
So for now vpecker OBD2 scanner is acceptable because it is even abundant faster than barrage and aboriginal for acceptable amount ($159), but not even abutting to Delphi or Barrage because of the functions that it cannot do.Launch X431 Pro3
Update
VPECKER Esaydiag and iScan accountability cipher clairvoyant are adapted online via Win XP~Win 10 system. Actual actual simple to update. So they can plan for all cars until 2015.Launch X431 Pad2
Language
Vpecker does bigger in accent compatibility, accoutrement 25 capital languages worldwide; while Barrage seems less, with 9 languages only. So if languages depend on customers, Vpecker will awning more.Launch X431 PAD 2

 1. Full Diagnose Function:Launch X431 Diagun IV

X431 diagun iv can diagnose the electronic control system of prevailing vehicle models covering Asian, European, American and China. Full range car models and full car system diagnose make it a professional automotive diagnostic tool.

Diagnosis functions include: Read DTCs, Clear DTCs, Read datastream, Special functions etc;

 

Ps. Vpecker language:
Italian, Chinese (Simplified), English, Chinese (Traditional), Japanese, German, Russian, French, Spanish, Portuguese, Polish,Turkish,
Dutch, Hungarian, Korean, Czech, Arabic, Indonesian, Persian, Thai, Vietnamese, Finnish, Swedish, Romanian, Bosnian, etc.
Launch language:
English, French, Russian, Japanese, German, Spanish, Italian, Portuguese, Chinese
That’s it. I should say, anniversary one has its own claim and demerits, but both VPECKER Esaydiag and Barrage X431 iCarScan plan ok until now. A acknowledged acquirement from China.

How to detect Auto GND badness?

01 starter operation, if the battery grounding wire temperature is too high, even at the end of the phenomenon of red on the ground, indicating that the battery grounding wire contact bad.X431 Tool

02 in the case of non-charged measurement of the resistance value of the ground point, that is, with a multimeter of a table pen reliably connected to the wire, Yanhua Digimaster 3 another pen and metal parts of the body connected to measure the resistance between them, if there is resistance, The VXSCAN EL-50588

03 using simulated vibration method. For the suspected parts, you can in the vertical direction and horizontal direction gently shaking the line, to simulate the state of TOYO KEY OBD II vibration when driving the car, while observing the reaction of the relevant parts to determine whether the ground with Weld, loose, poor contact or wire break phenomenon.Autel MS906  If you shake a ground line when the fault reproduction or failure disappeared, indicating that the bad place where the ground here.

04 When the circuit is energized, the voltage drop of the tapping point is measured with a multimeter. The reading should be as low as possible (close to 0). The method is to start the engine,Xhorse Condor XC-002 the use of multimeter DC voltage block, the red pen touch the generator output, black pen touch the engine body, measured a voltage value; and then the red pen touch the output of the generator, black pen contact The metal part of the frame, and then measured a voltage value. Under normal circumstances, these two voltage values ​​should be consistent. If the Autel MS908P former value is large, the latter value is small, a difference of 0.5V or more, indicating the existence of more than 0.5V voltage drop, it is by the engine body and the frame caused by bad grounding.

Detection of a point of the situation, it should be measured at the point of the power supply voltage, try not to measure the point of the negative resistance of the power supply, this is because the multimeter itself has a certain internal resistance, measured the resistance value of the larger error.

Toyota Land Cruiser 4700 service light reset

Toyota Land Cruiser 4700 sedan with a warning light, every 50000km will be lit, which means that the timing brought to the time,SKP 900  the replacement of the timing belt after the service light reset.x431 tool

(1) The first maintenance lamp zeroing method is as follows.XTUNER X500
1) Turn off the ignition switch when the odometer displays the "ODO" total mileage.
2) Press the short stroke button "trip" to turn on the ignition switch and keep it for 5s.
3) release the short distance mileage button "trip", in 5s and then press the short mileage button, the instrument displays "ODOXXXX".OBDSTAR X300 Pro3
4) Press the short distance button and keep it for more than 5s.
5) The warning light goes off when the check display becomes "ODO".
6) If the warning light goes out, restart the engine warning light off.
7) If unsuccessful, re-operate again.

(2) The second maintenance lamp zeroing method is as follows.Autel PS100

Press the mileage zero button, and then turn on the ignition switch 0 or 1, with the button to adjust it to 8, press the button again, wait for the screen to display mileage, turn off the ignition switch.obd

To zero, remove the rubber stopper beneath the dashboard, use a small tool through the dashboard hole, press the dashboard key to zero, re-set, and then check whether the warning light is still bright With

Launch X431 V Update Guide

Launch X431 V (X431 Pro)/X431 PRO3 V+ wifi/bluetooth abounding Arrangement Automotive Diagnostic browse apparatus is the absolutely substitutes X431 IV and X431 Diagun III. Both X431 V and X431 V additional abutment one-click amend which makes your amend job abundant easier. Here is the apprenticeship on amend the software.Launch X431 Pad2
Step 1 Uninstall Launch X431 V+/Launch X431 V client X431 Pro Mini

Two means uninstall X431 V+ client
1) Bang red box apparent “1” above. Columnist on X431 V+ figure and advance it up to the debris bin. X431 Pro Mini
2) Bang “Settings” >> baddest Manage Apps>> X431 V+ >>Uninstall
Step 2 Delete Files XTOOL HD900
This is X431 V client.
Find out “FileManager” in the Application
Click Memory Phone
Delete all files in this folder, columnist on the files and Delete figure will appear.
Step 3 Download Newest X431V / V+ Client
Browse Launch website www.dbscar.com.
Click Category Product, baddest Launch V or V+.
Click “Download for Android” beneath X431 V angel to alpha download client.
Downloading, amuse delay patiently, book about 19MB.
Launch X431 Diagun IV
Double bang X431_V.apk
Click “Installation Package” afterwards complete download.
Click “Install”
Click “OK” if the arrangement prompts to update
Click “Cancel”, because I haven’t login.
Step 4 Login
Login with your CC amount and password
Read Claim, bang “Read”X431 Diagun IV
Select Bluetooth Serial Number
Enter into action menu. Note: Customer Management is for users to add friends, mechanics and engineers etc to babble and fix abstruse problem.

Step 5 Download software
Click “Download”, this is old software version.
Select the cars you wish to download. Note: the software downloaded from official website is the newest version
Click “following”
Click “Download”
After complete download, no car software found, back its old version, avenue the BDScar site, and login afresh to update.Launch M-diag


Step 6: Amend one car archetypal software
Login www.dbscar.com, accessible X431 V, it prompts to update, bang OK
Do not bang Cancel, let it download affairs automatically, it will yield beneath than 20minutes.
Click “Installation Package” afterwards complete download.
Click “OK” to alter old appliance and the above advice will be saved
Click “Install”
After complete download, the car models will display
Note: bigger not bang “One Key Update” to update
Click “Association” to brace Bluetooth
Click “following”X431 Pro
Click “Download”
After complete download, no car software found, back its old version, avenue the BDScar site, and login afresh to update.


Step 6: Amend one car archetypal software Easydiag
Login www.dbscar.com, accessible X431 V, it prompts to update, bang OK
Do not bang Cancel, let it download affairs automatically, it will yield beneath than 20minutes.
Click “Installation Package” afterwards complete download.
Click “OK” to alter old appliance and the above advice will be saved
Click “Install”
After complete download, the car models will display
Note: bigger not bang “One Key Update” to update
Click “Association” to brace Bluetooth
Select the car models and software adaptation you wish to update.
Check software

How to clear the Auto engine carbon deposition

First, the risk of carbon deposition OBD2
 (1) pre-combustion chamber to start the nozzle hole with carbon deposition will plug the nozzle make the engine start difficult; 
(2) fuel injectors gather carbon  easy to stuck fuel injectors  cause the engine to stop the cylinder run or suddenly turn off;Carprog 
(3) the top of the piston carbon deposition will form a lot of hot surface cause premature combustion and deflagration  shorten the engine life;X431 TOOL 
(4) Cylinder head with carbon deposition  will reduce the engine cooling effect the engine's power and economy are greatly reduced;5054A 
(5) spark plug too much carbon  in the fuel after the wet  equivalent to the spark plug between the electrode shunt resistance caused by spark plug leakage can not work;Autel DS808 
(6) piston ring groove carbon deposition  will make the piston ring backlash, backlash smaller _ even no gap; cause the piston ring cement loss of elasticity even breaking the piston ring and pull the cylinder;PS100
 (7) valve duct and valve stem carbon deposition will accelerate the valve stem and valve duct wear and tear will even cause the valve stem in the valve tube within the hair astringent and stuck;
 (8) valve and its seat on the working surface of the accumulation of carbon will cause the valve closed lax and leakage _ engine difficult to start, work weakness and easy to burn the valve and other undesirable phenomena.automobile repair guide

Second, the formation of glial and carbon depositionFuel in the storage, transportation process _ prone to oxidation reaction _ the formation of colloidal substances. These colloidal substances according to the solubility of gasoline can be divided into: soluble and insoluble in the gum.Auto key programThe insoluble gel, also known as the sediment _ it joins the fuel tank with the fuel tank _ will be attached to the fuel filter _ plug the filter medium _ to reduce the amount of oil _ to make oil shortage _ fuel atomization bad _ Resulting in flammable mixture dilution _ engine power and economic decline.The sol-gel enters the combustion chamber and the gasoline together. After burning, it will form many hard deposits on the intake valve, the piston top, the piston ring groove, the combustion chamber, the spark plug and other parts. Acceleration is not smooth _ idle instability _ stall, jitter, knock and a series of failures.When the engine is working, it is not possible to burn 100% of the oil that is fueled or flipped into the combustion chamber. The unburned part of the oil forms hydrochloric acid and resinous colloids under the catalysis of high temperature and oxygen. Adhesive to the surface of the part. The role of high temperature and further MASTER MST-500 concentrated asphaltene and oil coke and other complex mixture of the so-called carbon. Vehicle driving _ because the fuel in the glial and combustion after the formation of carbon deposition caused by the failure is more common _ great.

Third, how to remove gum and carbon deposition Benz IR Key Program 
In order to eliminate these failures, it is necessary to remove the coke from carbon and gasoline. However, many of the current methods used in the garage are to be cleaned and then cleaned. This method is not only time consuming and costly. It is not ideal, and it is not possible to remove the glial from the tank and the tank. It is also not suitable for today's car engines because today's car engines are assembled according to stringent process requirements in a clean, dustproof and ultra-quiet environment. After cleaning and re-assembly _ its power, sealing performance can not be compared with the original performance.It is no longer necessary to worry about this because it is only necessary to add a certain percentage of the fuel system in the fuel tank cleaning agent _ can solve the problems caused by carbon deposition. Fuel system cleaning protectors are gasoline and diesel general products , Designed specifically for the EFI car design, there are gasoline engine dedicated _ in the car can automatically remove the hard carbon deposition _ the engine's performance back to normal _ no longer by the disintegration of the pain _ can completely remove the carbon _ Reloading driving pleasure.After using this product to clean the coke, you should replace the petrol filter, because the jelly and tubing in the glial material and sediment are gathered in this _ if not timely replacement _ may cause poor fuel supply.

Mercedes-Benz S400 car ECO function can not be used

A driving distance of about 75,000 km, equipped with 276 twin-turbo engine Mercedes-Benz S400 sedan. Customer Response: The vehicle ECO function can't be used.mb sd connect compact 4
     Fault diagnosis: after the car to start the car, no alarm on the instrument, connect the  MB SD C5 diagnostic computer for rapid testing, the control unit are no fault code. And the customer road test to verify the fault phenomenon, found that the ECO indicator on the instrument has been yellow, driving for a long time will not turn green.5054A
     Using the diagnostic computer into the engine control unit (ME) in the ECO state actual value, found that the actual value is normal, as shown in Figure 1.Foxwell NT510 Scanner

As the actual value shows normal, can not determine the fault range, try to engine control unit, transmission control unit, ESP control unit, before the SAM and after the SAM control unit are upgraded, the fault remains the same. Then after the throttle cleaning and 10min power failure, the fault still did not improve.OBD2
    First look at the ECO start / stop function How it works: When the vehicle is at rest, the ECO start / stop function automatically turns off the engine and starts the engine as soon as the driver wants to start. Turning the engine off when the vehicle is stationary can reduce fuel consumption emission. The engine control unit continually performs system diagnostics and evaluates the system status of the ECO start / stop function. All systems involved in the ECO start / stop function continually check their status and send this status to the powertrain control unit (N127) and send them to the ME control unit via the CAN C1 (drive system area network). If the functional requirements are met, the "ECO" symbol in the dashboard is green to inform the driver that the ECO start / stop function is ready.Autel PS100
    The function sequence of the engine auto stop is: If the following functional requirements are met, the ME control unit will shut down the engine. ECO start / stop function button lights up (that the system is fault-free and ECO start / stop function enabled); speed is 0; coolant temperature between 60 ~ 115 ℃; transmission oil temperature between 10 ~ 120 ℃ ; The engine speed is within the specified range; the range is at "D" or "flash"; the accelerator pedal is not operating; the running brake has been actuated until the vehicle is stopped; the brake booster has sufficient vacuum; the air suspension system , The auxiliary brake system and the distance control system do not perform the operation intervention function; the hood is closed: no collision signal; the steering wheel angular velocity is within the specified value range; the vehicle electrical system is in normal condition; the driver's door is closed and the driver's seat belt The temperature inside the car has been adjusted.http://www.x431tool.com/

OBDSTAR X300 DP VS XTOOL X100 PAD2 allegory table

In acclimation to accomplish you bright the aberration amid new accession OBDSTAR X300 DP and XTOOL X100 PAD2, actuality uobdii.com accord you a allegory table as below:
OBDSTAR X300 DP
XTOOL X100 PAD2
　

OBDSTAR X300 DP

XTOOL X-100 PAD 2
Operating System

Android 5.1

Android 4.4
CPU

Samsung Exynos4418 A9 industrial-grade processor.X300M

Rockchip civil-grade processor
Storage space

FLASH 16G

FLASH 16G
RAM

2G

1G
Battery

7400mAh

4000mAh
Resolution

1280*800

1024*768
Screen size

7 inch

8 inch
HDMI

Available

Available
Communication

Wire/Bluetooth

Only wire available
WIFI

Available

Available
Dimension

215*147*30

240*177*24
Shell

Three proofing and industrial-grade carapace with elastic coating

Civil-grade
One key upgrade

Available

Available
One key enter

Available

None
Database

Built-in database

Optional, pay extra
Technical support

Expert account team

　
Pincode inquiry

7*24 hours automated analysis is accessible for a lot of pin code

Manual inquiry
Fault diagnosis

All systems analysis are included

Only basal disgnosis for four system。OBDSTAR RFID
Conclusion:
OBDSTAR X300 DP is above to XTOOL X100 PAD 2 in abounding aspects, such as faster CPU, bigger RAM, continued abiding array and college resolution.
OBDSTAR X300 DP has Bluetooth and One Key Enter functions while XTOOL X100 PAD 2 cannot support.
For OBDSTAR X300 DP it’s no charge to analysis pin code, but XTOOL X100 PAD 2 charge analysis manually.OBDSTAR F102
And a lot of important is that XTOOL X100 PAD 2 can alone acquiesce you to analyze the basal four systems, but with OBDSTAR X300 DP you can analyze all systems!
OBDSTAR X300 DP abounding package
Immobilizer+ odometer adjustment+ EEPROM/PIC adapter+ OBDII+ ABS+ TPS+ SRS reset+ TPMS(low tire)reset+ Steering bend reset+ CVT learning/Value reset+ EPB+ Oil/service reset+ Array matching+ Analysis for Japanese and Korean serials (extra benefit function)
Article anatomy OBDSTAR Blog ： OBDSTAR X300 DP VS XTOOL X100 PAD2 allegory table

How to solve auto air conditioning abnormal

Automobile air conditioning abnormal sound phenomenon (Daewoo car as an example) OBD2

Failure phenomenon for the lack of cooling, open the engine cover, run air conditioning and refrigeration systems, air conditioning compressor abnormal sound, and sometimes accompanied by significant vibration.Launch X431

cause of issue

The circuit connection is loose, causing the clutch 4 to be jammed

Clutch line is quiet Launch X431 V 8

Clutch clearance is too large

The belt is loose

One of the two belts is broken at the same time

The compressor base is loose or worn Launch X431 V8

The compressor bracket is loose or

Compressor bearing is damaged

Tension wheel is damaged or lack of oil

Excessive refrigerant, causing liquid blow

Frozen oil too much, causing liquid hit

Compressor inside the internal (usually valve damage)

Maintenance method
Connect the circuit as required
Replace the clutch coil
Adjust the gap to 0.4 ~ 0.8mm Reactor bearing damage Replace the clutch bearing
Tension belt
Replace two belts
Tighten the compressor base or replace the base
Fasten or replace the compressor bracket
Replace the compressor alone
Replace the tension wheel assembly or bearing
Emissions or recycling of refrigerants or refilling
Release the frozen oil
Repair or replace the compressor.