Engine idle instability is the form of idle speed, fast or slow, or vibration, making the car in the rapid deceleration or shift when the flameout.
The reason
There is air in the oil.
Low pressure oil supply.
Improper adjustment of idle speed stabilizer.
The injector atomization.
The Baotou beiben heavy truck parts are not fuel injection pump.
The governor of each connecting rod pin, the fork head wear too much.
The diagnosis and treatment methods
When the diagnosis of idle instability, the engine should be based on the length of time and the maintenance of the engine to analyze and judge.
The first should check the oil low pressure oil is smooth, check whether _ filling diesel to meet the requirements of Baotou beiben heavy truck parts, engine maintenance is timely, otherwise it should be clean or maintenance and replacement.
If the car long time stop or oil not timely supplement, a small amount of air into the oil, exhaust gas treatment should be carried out.
If the car use for a long time, Baotou beiben heavy truck parts of fuel injection pump is also repeated debugging and did not see the governor of the wear and tear, pay attention to each connection speed test element, throttle rod without too much wear phenomenon in debugging. Otherwise they should be replaced or repaired. For the welding of rotating parts, we should pay attention to the symmetry of the quality and ensure the balance.
The idle instability with vibration, is due to the fuel pump oil caused by uneven, available by cylinder oil method check. If the cylinder does not cause a change in the speed of rotation, it shows that the cylinder oil supply is insufficient or the injector atomization bad. Should first check the injector, check the fuel injection pump.
If the device is idle to adjust properly, should be on the test bench maintenance.