I have seen lot of information here and I am totally confused - where do I start
It has been really cold for the last couple of weeks and that is when the problems began:

  • Car starts at really high rpm (3,000) then rpm drops and car dies (IAC is one year old)

  • If I force it to warm up by pressing the gas to keep it from stalling for 3-4min (rpm @2,000) it eventially misfires and CEL flashes, but it stops flashing once I restart the car

  • Once driving, I am constantly loosing brake boost . To get it back, I have to shift into Neutral, rev the engine (over 3000 rpm) then press the brakes again and the boost is back.

  • On the highway, (at 2000-2500 rpm), sometimes the car hesitates while going at a constant speed

  • Idiling is rough and at low rpms, and I always have to shift to Neutral to avoid stalling at traffic lights.

I have read many threads that suggest: vacuum leak, fuel pump, fuel filter, clogged injectors and many others.
Can someone help me, where do I start and what would be the least expensive things to do and in what order?


96 Mystique V6 2.5L Duratec Unfortunately ATX, 150K+