Quote:
Originally Posted by homemade87
There is a temp sender that the computer sees to know when to enrich and bring the idle up . This sender may be out of calibration in those temp zones you are talking about .
Also you may want to look into the air idle control . It could be dirty or malfunctioning .
I don't think you can do away with this function . It has to work together as a whole .
If you get the problem fixed it will work as you want it to .
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Do you happen to know where this sensor is located? Perhaps just replacing it would help. Its probably from 1987 so it could have gone lousy by now. The truck does have new coolant temp sensors. Well newer. IIRC I replaced them about 5 years ago.