Finally got that darn Intake Manifold Gasket replaced on my 96alty. The Rough Idle and the rpm surges are now history. It finally runs like it did when I first got the darn thing. Now I wont get asked....What Kind Of Cam Do You Have?
Was your engine light going on? Was the engine making a clicking noise. Mines doing that. Its either that or something with the intake tube. It went away and has not came back for a while so no worries.