Quote:
Originally Posted by PaulC
I also seem to recall Schrader valves on the fuel rails, faciliating a fuel pressure evaluation.
It's been my experience that IAC valves that are viable in warm weather can act up as the temperature drops, so Aklim may be onto something.
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THIS might help
If he had an L98 engine I would say he should hook up a scanner and see if he gets about 20 counts but I would THINK that the principle should be the same. That is how I adjust minimum idle since my system is so "non stock". If his passages are clogged up, it could be an issue since the IAC might be commanded to close up but the carbon there might still allow air to go thru and it could be turning lean.
Also another thing that makes me wonder is this. If it acts up when the engine is warm, wouldn't that mean it is acting up in closed loop? IOW, it cannot compensate. Maybe the O2 sensor is lazy?