Engine automatic flame failure diagnosis

The diagnosis OBD2 Code Scanner of this type of failure, the first application of the shaking handle diesel engine crankshaft crank, found fault according to the fault appearance.
(1) diesel engine crankshaft rotation flexibility, but can not hear the sound of the injector fuel injection, you should check the diesel fuel tank has run out, and should add a little if you have run out of diesel, and the exclusion of the circuit in the air. If a diesel fuel tank, you should check the diesel filter, fuel tank switch is blocked, tubing or without cracking tube connected to the bolt is loose. Open circuit should check diesel moisture; should also check whether the fuel injection pump plunger stuck broken oil pump spring and delivery valve spring. Such as fuel supply is normal, may be the injection nozzles killed or injector spring break should remove the injector grinding glib or replace.
(2) flexible rotation, such as diesel engines, diesel engine crankshaft crank can hear the sound of the injector fuel injection supply system is working. Diesel engine compression good, you should check whether the rocker arm and rocker seat fracture, valve clearance adjustment screw is loose or broken valve push rod is off, these Car OBD2 Tools reasons can make the valve can not open caused the automatic shutdown of the diesel engine.
(3) If you do not open the decompression institutions can quickly crank diesel engine crankshaft, even a little sense of compression, you should remove the cylinder head cover, check whether the valve spring break, the air lock folder without loss, whether the broken valve . If these are normal, you should also check the piston is broken, the cylinder head gasket is damaged.
(4) If the pan is not moving diesel engine crankshaft should immediately check whether the cooling water tank, water box anhydrous, it must piston, cylinder liner stuck due to excessive thermal expansion. At this should allow the diesel engine to cool themselves. Not immediately add cooling water, otherwise it will Enthusiasm parts of diesel engine body, cylinder liner cracking and damage. The water inside the water, pull out the oil dipstick, check the sump oil level. When you pull out the oil dipstick, smoke a lot of heat, you should remove the body from the oil dipstick jack cover, check the rod bearings and main bearings due to poor lubrication caused by bush-burning axle accident. Bearing parts is quite dry, no oil drops, and obd2 software the temperature is very high, it is certainly occurs bush-burning axle accident. Remove the bearing, such as bearing alloy Lamao, available the doctor fine scraping bearing the nap parts, polished with fine emery cloth crankshaft journal, to identify bush-burning reason and troubleshooting after re-use; such as bearing alloy melting or peeling, and should be replaced with new pieces.
(5) If the body, water tank, the rear cover is broken, you should check the connecting rod bolt is broken, the upper and lower balance shaft with or without fracture.
(6) After the above checks, if the diesel engine working automatically shut down, you should check whether the supporting equipment to produce 自動車故障診断機 a malfunction diesel automatic shutdown.