I seem to be having an issue with a 1990 Buick Skylark 3.3L engine. Only on
very cold days at first start-up it will idle way to high and I have to shut
it down and re-start and it will idle fine. Sometimes it takes a couple of
times to shut down and restart.
IAC was replaced this past summer (AC Delco parts)
Coolant Temp Sensor was replaced this past summer (AC Delco parts)
I got a code for low TPS voltage and I have replaced it, but still getting
the same problem. It is not every time either, but for the most part every
time it drops below 30's it will give me the problem. Throttle plate is
clear.....no build up.