Originally posted by 91_Hulk_Si
They call it a 4 stroke compression test because you unhook the spark plug wires and crank the engine 4 revolutions.
No... they don't. It's a 4 stroke compression test because that's what kind of engine it is.
Make sure when you do a compression check you remove all spark plugs, hold the throttle at wide open, and crank until the guage doesn't increase any more. That's the only truly accurate way to do a compression test, period.