Hi there,

The usual question asked is "have you cleaned the throttle body?" Since you don't mention having done so, that would be the place to start. The problem arises when the throttle position switch (TPS) can no longer close completely at rest or the idle motor gets gummed up with condensed crankcase vapors. Cleaning the throttle body goes hand in hand with cleaning the idle air valve and checking the TPS operation.

You can get a dozen different suggestions on how to disable the preheater function at the airbox, but assuming the tubing is intact, here's the baseline on replacing the airbox thermostat. http://cleanflametrap.com/airbox.html
--
Art Benstein near Baltimore

If you don't pay your exorcist, you get repossessed.