Quote Originally Posted by FullsizeRST View Post
ok i just did it again and every thing read fine except the #7 was 70 lbs off of the others

i was told to put a little oil in there and see what it reads then to see if it is the rings or the valves ..does this sound correct?
Sounds right. Was #7 lower than the rest? Common with piston or ring problems. You need a leak down test. The test requires a leak down tester and compressed air as well as regular hand tools. It will tell you where the compression loss is.