How to use the car fuel pressure gauge?
A three - way connection must be made. The two heads are connected to the tubing, and the third head is attached to the pressure gauge so that the pressure in the tubing can be measured
Series connected in the oil circuit
Usage method：(1) start the engine and switch to the normal operating temperature, turn off the engine, and then remove all the spark plugs when the engine is stopped;(2) the solar term valve is fully opened, the pressure gauge connecting head is pressed on the spark plug on;(3) use a motor to rotate the engine at 100 150r / min speed for 3 to 5 seconds. At this point, the pointer on the instrument will gradually rise, to a certain value that will stop, at this point the indicator value is the compression pressure of the cylinder;(4) press the button to make the pointer zero;(5) repeat the measurement 2~3 times according to the above procedures to improve the measurement accuracy.(6) general car cylinder pressure >0.9MPa and delta <8% (pressure of each cylinder, gasoline engine cylinder average pressure of not more than 8%).If the measured value is smaller than the specified value, and the intake system is normal, it can show that the cylinder and piston, cylinder head leakage, the original cylinder, piston, valve, piston ring wear, ablation and other undesirable situation. If the measured value is greater than the specified value, and the intake and exhaust system is normal, the possible cause is the serious carbon deposition in the combustion chamber.
