How is the Engine Compression Checked?
The compression should be checked in any instance when an engine is running roughly or is lacking power. Engine compression on a gasoline engine can be tested in two ways. One method of testing involves the use of an electronic engine analyzer. But for the do-it-yourselfers, the easiest method is the manual compression test using a manual, handheld compression gauge. A screw-in gauge is generally more accurate than the gauge with the rubber seal.
