Know what you mean Kim.

Have you got a compression tester?
If so, do one (pref with the engine warm). Naturally do one at a time and the readings should be between 130 -140 psi on each cylinder. If there is a significant drop on one or more cylinders, there is a problem.

If they are below 120, its not lookin that good!

Get back to me if you need a hand.... where are you btw?