This all started while my daughter was driving home from college and after she had put about 100 miles on the car. While the car is in neutral and stopped the engine will acelerate ok while engine is still cool. After it just barely begins to warm up it begins to stutter under a mild aceleration. The warmer it gets the worse it gets. It will stutter all the time when in gear and under a load. I found a mouse nest way down at the opening to the make-up air to the filter box. I replaced the air filter, fuel filter, checkled the plugs (new - not fouled, correct gap, but Champion probably should be Delco. Anyway there are NO codes on my scanner. The fuel pressure is correct. I checked the MAS sensor - seems OK but maybe it's not but again there are no codes.
Aug 2, 2008 at 8:17 AM