A compression test is to determine how much pressure the engine makes, and a leakdown test measures its ability to hold pressure.

Begin by generating a transition delay test for your scan design without adding any compression, and measure the testable fault coverage, defined as the ratio of detected faults to detectable faults ...

All you'll need to do to test it is remove all the spark plugs and install a compression tester. Then disconnect the coil, hold the throttle wide open, and crank the engine over several times with ...

Cars 101: How to Do a Compression Test We walk you through a compression test, a great way to determine the condition of your valves and piston rings.