A compression test reveals the condition of your engine's valves, its valve seats, and piston rings and whether these parts are wearing evenly. Healthy engines should have compression over 100 psi per ...

The purpose of your engine is to compress fuel and air and then ignite it, creating heat energy that then makes mechanical motion. If your engine can't compress the air and fuel properly, the engine ...

To help detect and pinpoint faults in ailing motors there are various aids, such as warning lights on the dash and on-board diagnostics. But there are a couple of simple tests that give us a pretty ...