Hi all, prepping a 1990 1.6l. During the initial evaluation, after noticing a low speed miss, we got the following:
dry compression test, warm engine:
Cyl1=180 psi, 16% leakdown
Cyl2=190psi, 73% leakdown
Cyl3=180psi, 37% leakdown
Cyl4=205psi, 19% leakdown
I'm not getting the cyl2 numbers. Doesn't make sense. Air can be heard escaping from tailpipe during cyl2 and cyl3 tests.
Leakdown gauge is a MAC, compression tester is craftsman. Valve cover was off to inspect timing belt, so valves were verified to be closed (or should have been unless lifter was gummed up and extended all the way).
What would be the next step? Pull cams and re-check? If the same, is it time to pull the head and do a valve job? Thank for any input.