AUGuy21

I have a '99 GS3 w/ 105,000. I am fully aware of the low idle problem, but have read that it is most problematic with the A/C off. However, I have a low idle (around 400RPM) when the A/C is ON. If the A/C is off and I start the car, it idles fine. If the car is idling w/ the A/C on and I then turn the A/C off, RPM's shoot up to 700 or so and stay. Anyone know why I'm having this problem?

maintrain

iTrader: (1)

Sounds like your alternator isn't kicking out enough amps. May wanna get it checked at autozone or pep boys for free. Just replaced mine about 3 months ago.

punch10

Maybe your idle control valve is on its way out.

Lexbox

There is also a thread somewhere around here about adjusting the throttle cable. But before you do that definitely get the alternator checked out.