Sounds like it might be a small exhaust leak. Manifold to head, or manifold to down pipe. Just a wild guess.

Does it make the noise when you just sit in the vehicle(stopped) and rev the engine? Is it sort of a ticking sound that gets faster as you rev the engine(faster relative to engine RPM)???


David
?'90 Trooper?2.6L?Auto?DELTA Cam?AMC Head?"DN" Lift?SlakAzz Sliderzz
?TrXus M/T's?Black Rockcrawlers?Lockers by MIG & ARB?ProComp ES9000's
?Pics and junk...Thx Tad!!