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Buick Junwei valve chamber cover pads often leak oil
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  • Automotive repair

The mileage is over 230 thousand km, with 2004 Buick Regal 2.0L cars equipped with L34 engines. The car smoked in front of the hill and asked for relief. When the maintenance personnel arrive at the vehicle site, the machine cover is found to have leakage of oil from the valve chamber cover (upper part of the exhaust pipe) and leaked on the exhaust pipe. After inquiring the customer, the vehicle has been regularly maintained, and the valve chamber cover has been replaced for 3 times, but the malfunction is becoming more and more serious. Fault diagnosis: because the car has changed 3 valve chamber cover pads, and each time from the same place out of oil, after dismantling, carefully observe ...

The modern gentry engine slowly stalled and could not start.
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  • Automotive repair

A 2008 modern Hyundai Car with a mileage of about 120 thousand km was slow to stall during the driving process and could not start. Troubleshooting and Troubleshooting: receiving the customer's distress call, the maintenance personnel bring the conventional tools to the scene. After the customer reflects, the vehicle is filled with oil in the first few days, driving a distance to extinguish the fire 7. according to the conventional inspection, open the ignition switch, try to start the engine many times, the start of the engine is strong rotation, can judge the battery capacity is sufficient. With enough fuel and electricity, why can't the engine start? From the circuit analysis, start the e...

The Buick engine is unstable and smoky
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Oxygen sensor fault reason: Engine black smoke and fuel consumption reasons are the following. (1) the air-fuel ratio of the engine mixture is too strong. Second, due to the poor working of a certain cylinder, the power loss will be greater and the cost of oil will be reduced. (3) some sensors on the vehicle are damaged, resulting in too much PCM control fuel injection. (4) the atomization of the injector is poor or sometimes the oil is leaking. The oil pressure is too high, resulting in excessive oil supply. Troubleshooting: first, use TECH2 to check, no fault code output. Reading the data flow view, it is found that the heating change is normal, but its value is high: the temperature senso...

Passat B5 car cold car without idle speed
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  • Automotive repair

After receiving the vehicle, the trouble code is: 01165 the throttle control unit J338 has not reached the adjustment limit and the 17967 throttle control component J338 has basically set fault. Unplug the throttle body plug and turn on the ignition switch. There are 3 sensor voltages such as 5V, 5.1V and 4.9V. The idle switch F60 has a 10.49V voltage and the junction voltage is 0V. Install the plug, pull the throttle gate G88 has the signal voltage of 0.6V from 4.42V to full open, the G69 signal voltage 3.72V is 3.72V, the 1 foot motor control line open key and the car running without voltage. The measurement of idle speed motor is 18.5 Omega. The data flow shows that the throttle opening o...