Run a wet and dry compression test on it, sounds like a valve problem My '90 started doing the same thing back in December, ended up with a bad #4 cyl, and #2 & #6 cyls are low as well. I need a valve job again. <img src="/forums/images/graemlins/angry.gif" alt="" />

More than tread lightly. Leave it like you were never there, nor anyone else.
'90 X-cab 4.88's 33 BFG AT's, rr ARB, Headers, Ignition upgrade, cold air induction.
'91 X-cab 5.29's 315's BFG MT's, rr ARB, custom bumper and flatbed