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Car runs like sh*t with A/C on

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Deadly BlaZe

15+ Year Contributor
1,890
5
Oct 2, 2004
Alpharetta, Georgia
ok well basically, my car won't run for sh*t with the a/c on. In neutral, the car will idle really badly and stall most of the time. When in gear, the car feels like it loses 50% of the little horsepower it already has. I'm not sure but could this be because of the little wire connected to the throttle body or intake manifold, some where around there. I think its the ISC or something like that. Thanks for any help.
 
It's your ISC. It can't compensate for the added load of the A/C compressor. Swap it out with a known working unit.
 
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