Originally Posted by AutoCouture
if its the pump you would have had a CEL.
Make sure all the harnesses are plugged all the way in and that the correct wires are in the correct position
i was 3000-4000 miles free of any issues. Car just suddenly stopped running well.. i did get a engine malfuction light about 500 miles ago.. and i had a stumble like this like 2000 miles ago, but i had lights.
Each time, i turned off the car and restarted and it was all better.
I'm thinking it is the HPFP...