Heavy Howard from the oil pressure unloading is idle to 1 how to solve the pressure

Answer:

Adjust idle work, must be normal in the engine temperature, valve clearance properly, ignition system is normal, and all the pipe seal well, choke door open, throttle closed tight under normal conditions. When adjusting, the throttle opening adjustment screw is first screwed out to make the engine reach the minimum steady speed. Then screw into the idle adjustment screw, when the engine is about to stall, then slowly spin out the idle adjustment screw, so that the engine stable operation and high speed. Then, the throttle opening adjustment screw is screwed out, so that the engine speed can be reduced to the minimum. Then adjust the idle adjustment screw to increase the engine speed. This is repeated until the throttle valve opens at minimum and the engine runs at the lowest steady speed. Finally, increase the speed and suddenly shut down the throttle, so that the engine does not turn off and still rotates.

When the engine is idling, the idle speed should be adjusted according to the actual situation. After adjustment, if the fault disappears, the idle screw is improperly adjusted. After adjustment, such as fault can disappear, the solar term door a little, to keep the engine running, check with cotton or paper, carburetor, intake manifold gasket is leakage, such as leakage, detachable idle orifice are examined, and the blowing of idle oil pipe, and then reassembled test, such as time the fault disappears, illustrate the idle hole and idle oil blockage. Idling cut-off valve for a carburetor, should also check whether the idle valve solenoid circuit is normal, if the idling oil saving orifice is blocked due to the electromagnetic coil circuit is not normal, the idle stop valve repair.

A normally functioning engine should be able to operate evenly within the speed range of 300-500r/min. If the engine minimum steady speed exceeds this speed range, or in this range of speed, the engine flameout, the speed is unstable, that is, no idle or idling bad. When the idle speed is bad, it can be divided into idle speed flameout, idle speed instability and idle speed according to its fault characteristics. If after starting the engine, from low speed to high speed circuit has good, but release the accelerator pedal immediately after flameout, or first running unsteadily and flameout, for idling flameout fault. If the engine idle running is not smooth, the exhaust pipe "sudden", "sudden" sound, it is generally idle instability failure. If the minimum steady speed of the engine is higher than the specified range, and the speed is not lowered, the idle speed is too high or the idle speed is not enough.

Idling unstable performance: idle operation, the engine trembling, uneven speed. The reasons are: idle air hole plug, idle device malfunction, individual cylinder spark plug spark is too weak, the individual valve seal, intake manifold leakage, the ignition time is too early or too late, idle improper adjustment. The engine idle speed instability, should first adjust the idle speed, such as idle adjustment after the fault can not be eliminated, should check whether blocking the idle hole and idle air hole, such as the amount of pore clogging, use gasoline or acetone cleaning with compressed air blowing through the hole is not blocked; such as the amount, should be stable in the engine speed listen to a certain speed, the intake manifold or the carburetor, the lower gasket is leakage, such as leakage phenomenon, use fastening screws or addition and subtraction method to exclude the gasket. If the idle speed at the same time, accompanied by engine power down phenomenon, you should further check the spark plug operation, the valve sealing performance and ignition time is correct, if necessary, should be overhauled and adjusted.

The spark plug is bad; 2, the vacuum tube leakage; 3, high-voltage leakage; plug 4, PCV valve; 5, solar term door position sensor fault; 6, idle stepper motor; 7, idle control valve failure; 8, solar term door opening is not normal; 9, air intake system.