John,

What I'm reading from this person's description is basically that you pump
air into the spark plug holes and listen where it comes out--exhaust,
intake, or coolant. Why do you need even to measure the pressure? Are there
some specs to measure against, eg., each cylinder should hold x amount of
pressure for x seconds? If so, what are the specs? I've never done one of
these tests before.

Thanks,

Geza