You are comparing cylinders to each other at points, such as the first pump and the 6th, not how high can we go with no pattern involved. The first pump is what we call testing the rings.Ĭount the pumps as the compression gauge is pumping up higher and higher, what is the pressure at 6 pumps, some mechanics go and go until the compression is done getting stronger, I DO NOT. Lets say on a cylinder, that first pump is already on the compression stroke and the first pump is low. When you get a helper to crank the engine, you watch the compression gauge, it should pump up quickly, lets just say 60PSI. Make sure the battery if full, you can even do it with a charge on or a jumper from a friend just to keep the battery up, each cylinder you test will lessen the power of the battery. Your next step is to do a compression test.
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