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  1. M

    2002 4.0 Lean when cold, Rich when hot, A real headahce

    I agree that it is odd as well. Things obviously shrink and expand with changing temperature, but it's hard to see what could be causing equal and opposite effects when cold vs hot. I'll have to see if I can find a new manifold for a reasonable price or snap one in good shape from the junkyard.
  2. M

    2002 4.0 Lean when cold, Rich when hot, A real headahce

    So just an update in case anyone cares. Took the car into the ford dealer with the hopes that they would know what was going on. Yeah that was totally useless. Paid $80 for them to tell me they needed $700 to replace the intake manifold gaskets, something I have already done. I bought another...
  3. M

    Bucking engine

    Well I'm not an experienced Ford mechanic, but at 182k miles, if those are really the original plugs they definitely need to be changed out for some new ones. Wires I might be less concerned about, but change them anyway, its cheap insurance. If I were you I would pull the plugs to see what...
  4. M

    2002 4.0 Lean when cold, Rich when hot, A real headahce

    I will also add somewhere in there I compression tested the engine and got readings of around 190-210 for each cylinder so the engine is definitely healthy. This morning I also ran the car through one of those automated car washes to see what would happen and nothing did, so maybe I'm just...
  5. M

    Locate & replce faulty IAC motor

    Bahahahahaha Could you give a little more information. Does the car act completely normal otherwise when driving. Has your mileage changed in sync when this rough idle started? Are there any associated Check Engine Lights? Could be a vacuum leak. I'm not sure what info the car uses to...
  6. M

    2002 4.0 Lean when cold, Rich when hot, A real headahce

    I've had my '02 ex for about 10 years now. It got a new engine (jasper) around 80k miles, a new rear end around about that same time, and a few other small bits here and there, but is completely stock no modifications. It now has 132k miles on it and it has been giving me an absolute run for...
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