Turns out someone ran the ignition harness between the trans dip stick and the EGR. Over time the EGR had melted the harness and it burnt a hole and three wires where grounding out (that explains the cold mornings)
A little tape around the wires and rerouting it on the other side of the dip stick with some zip ties and it runs like a champ.
As quick as it was diagnosed I felt like this was a problem the dealership had seen before. Well worth the $57 that they charged me for this information.
It was not a fun fix, there is a lot of car that has to be taken off to get to the harness. All told it took me about 4-5 hours.
I also found that all the ignition wires for the front 4 cylinders had the wire striped as it went in to the covered area that the coils are at. Very strange that I never got a problem with this.
My original plan was to remove the wiring harness and then try and get one from a junk yard if I could not find the bad wire. I was worried at first at being "that" guy who brings his failed attempt at being "a" mechanic to a real mechanic to fix it after he had messed it up. I'm very good with my hands so I figured I had a good chance on getting it done. They wanted $2200 for a new harness plus install costs, so I had a lot of inspiration and motivation to figure it out.
Thanks. I'm not sure any one could have guessed this one.
Tuesday, March 23rd, 2010 AT 6:38 PM