AutomagicLS1

iTrader: (18)

Ive got this insane misfire problem I have no clue whats going on. It all started damn near september or somewhere along there. I actually made a thread on here awhile back about it. I was at the carwash one day and left the car running and lightly sprayed under the hood to clean things off. This issue is really beginning to **** me off. I have pulled the pcm out, injector harness clips, coil packs, plugs/wires changed. I cleaned all the electrical stuff with electric cleaner. All the moisture seals in the coil pack connectors, injector connectors, all were in great shape. When you start the car it has a HORRIBLE miss like practically running on 4 cylinders it seems like. After you drive the car for 15 min or so it goes away. SOon as you shut it back off and turn the car on its back everytime. We had some really warm weather here a few days ago, it's very obvious in warmer temps it lasts alot longer. When I drove the car in 20 degree temps a couple weeks ago it doesnt last near as long. Also my car is not throwing any codes. I've tried hooking up a scanner to the car and it's not getting us anywhere. I belive the misfire detection is turned off in my tune. It's just odd this long if there was moisture it would have dried up unless somthing got screwed up. Any ideas?