What are the steps for engine cylinder pressure testing?

[RicardoAnn]

The steps for engine cylinder pressure testing are: 1. Ensure the engine reaches normal operating temperature before shutting it off; 2. Remove the spark plugs from each cylinder of the gasoline engine; 3. Fully open the throttle valve and choke valve; 4. Press the conical rubber tip of the handheld cylinder pressure gauge tightly against the spark plug hole. Note: For diesel engines, never use a handheld cylinder pressure gauge—instead, screw it into the threaded hole of the fuel injector; 5. Use the starter to run the engine for 3 to 5 seconds at normal speed, record the reading on the cylinder pressure gauge, repeat 2 to 3 times, and take the average. If the starter is not used to drive the engine, you can also crank the engine 1 to 2 turns with a hand crank; 6. If the measured pressure in all cylinders is very low, pour 20 to 30ml of engine oil into the cylinder, then crank the engine several turns and measure the cylinder pressure again using the above method.