1.4 How to adjust the idle speed of the Big Dipper?

When the idle speed of the engine is unstable, it should be adjusted when the engine temperature is normal and the oil circuit is trouble-free.

Use a screwdriver (commonly known as screwdriver, screwdriver) to slowly loosen the throttle opening adjustment screw, and when the engine is about to turn off, screw it in a little more to maintain the engine running.

Adjust the idle mixture adjusting screw. Let the engine run faster.

Turn out the valve opening adjustment again to realize stable idle work, which is both accelerated and flameout.

The cold car is normal, and the hot car is normal after accelerating. The indicator light only comes on when the hot car is idling.

It shows that the engine oil pressure is insufficient and cannot reach the standard value when the hot car is idling. The reason is that the oil pump is faulty.

The viscosity of hot car engine oil decreases, and its fluidity is better than that of cold car. At this time, the internal gear or pressure valve of the oil pump has too large clearance and wear, which will lead to partial oil loss and reduce the system pressure.

Acceleration will lead to a continuous increase in oil pressure, and the superimposed pressure will make up for a small part of the lost pressure. Therefore, there will be no problem in running the engine at high speed continuously.

This is the performance of the beginning of the fault, which proves that the fault has not reached a serious level. Need to replace a reliable oil pump, the problem will be effectively solved.