There are 3 possible configurations. I have attached images for all 3.
A faulty or clogged EGR valve can can cause a miss, but it isn't likely. It's most likely either a vacuum leak, low compression, a bad stator in the distributor, or maybe carbon traces inside the distributor cap causing arcing between terminals.
Images (Click to enlarge)
Wednesday, October 5th, 2011 AT 6:23 AM