Originally posted by NCBoost
The guage will hold the pressure till you press the button to release the pressure.
That's true, but part of the value of the test is being able to see how quickly compression jumps up. It should hit about half of the max value on the first stroke, half that again the next stroke, tapering off as you approach the final compression number, or build in a fashion at least similar to the above.
Anybody can crank the car for you, just offer a neighbor a beer to help you or something.