Replaced the coil to plug connector on the middle coil. The old one had evidence of arcing on the inside. Also found that the air intake crossover pipe was not seated correctly into the boot on the manifold. Corrected both of these situations and now the car runs great- finally! I will change the other 2 connectors next week.

There is still a little bit of revving up and down at idle, which may suggest another small vacuum leak somewhere. Until I can check that further I can at least drive the car and live with it.

After $2000 in repairs (engine wiring harness, EGR valve, plugs, wires and diagnostics) and lots of posts and replies (thank you!) I have learned that next time misfires happen start with plugs-coil connectors-ignition wires and sp connectors-coils, etc. In other words the least expensive components first and work your way back! Wish I had done that but what the heck did I know?

Thanks for your help....


My next project: the driver's door lock linkage has either broken or come undone as the lock cylinder will not open the door or operate the power door lock system. Is it a huge deal to take the door panel apart to get at it?