So, after replacing chain, guides, tensioner and oilers and describing in another thread the leaking driver's side valve cover I go back in and meticulously take everything off, clean and replace gasket and cover. Success! Or so I thought. When I went to start it the car idled badly and ran even worse. Drove it around the block thinking it would work its way out. Started smelling burning plastic and when I opened the hood smoke billowed out. What now? I went over everything I touched and noticed that as careful as I was somehow two of the plug wires got reversed. Fixed that and the car runs as it should. Question. What the heck could have been burning and am I lucky to have shut the motor off in time or do I have a ticking time bomb here? Somewhere in another thread I read about the EZL-could that be the part in question? The burning seemed to come from below the driver's manifold. Or could I have somehow just dropped a piece of plastic on the manifold (have no clue what) and it started melting?