BLUE99STANG

Hey I have a 1999 mustang GT and whenever I turn on the A/C the car idles like crap; as-if someone is messing with the throttle? Is there an easy way to fix this problem? Also my clutch is really hard to push in (compared to my dads ’64 ½ mustang with a zoom racing clutch) is this normal?

Thanks for your help,

Tyler

Fizzics Boy

wut do you mean by idles like crap? does it bounce around, or just drop a little. all cars idles will drop slightly when the AC is turned on. as for your clutch being hard to push in, is it still the stock one? there could bea bunch of reasons why its hard to push in.

BLUE99STANG

Yes, the idle bounces around from about 650 to 900. The clutch is stock as far as I know……have any suggestions?

-Tyler

Fizzics Boy

how many miles on the car? it could be numerous things and since ive never experienced a bad clutch, i really cant be any help. im sure someone else here will chime in. as for the AC, how does your car drive with it on? cuz if drives fine then my guess wwould be your IAC.

BLUE99STANG

Car has about 70,000 miles. With the A/C on it feels like surging when driving, I have replaced the IAC with no luck.

mark8796

I had the same thing start to happen. I still haven't fixed it. My A/C compressor clutch has now seized up. You are experiencing the beginnings of that, I think. My car rattles and squeeks now. $ soon to fix. Was thinking of maybe doing it myself, but I don't know much about A/C. I want to ssay you can swap the compressor clutch itself, but I'm not sure. If not, then the compreesor as a whole. not sure. good luck.

kylebgt

Iac, I had the same prob.

JPGT_00

He said he already replaced with no luck.

Maybe the belt is slipping, what about your Alt and battery, are you getting a good charge on both. Take your battery and alt in to Advanced and have them check it out.

BLUE99STANG

The alternator is about 8 months old, battery about 6 months old, and the belt is about a year old.[/align][/align]-Tyler[/align]

8banger

Low Freon.....too much cycling of the ac clutch....?