Engine Performance problem
1995 Chevy Lumina 6 cyl Two Wheel Drive Automatic 316000 miles
My car began running rough last week. NO CEL. It felt as though a plug wire was missing. I did the head gaskets and lower intake gaskets last November. Here`s a list of things I`ve done this past week with NO change in condition:
New plugs and wires. Checked coil packs by replacing with 3 known good packs. Checked for good spark. Checked compression. All cylinders were 180 to 190 lbs. Checked fuel pressure. Changed fuel filter, removed rocker covers and checked for missing or bent pushrod. Removed fuel injectors and tested for spray. Had them serviced/cleaned at a GM dealer. Dealer found cylinders 1 and 3 not firing though lots of spark. New fuel injectors on cylinders 1 and 3. Changed left head with refurbished head. New head gaskets and lower intake gaskets.
What am I missing? The engine visibly shakes. Is it possible the timing chain jumped a couple of teeth?
have the same problem?
Monday, May 25th, 2009 AT 2:20 AM