Question about Geo Metro

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1990 Geo Metro. Driving down the road with the a/c on the car loses power and starts slowing down. Also hear a sound, like compressed air being released the wife says under the car behind the front seats, I think its coming from exhaust. I spoke with a couple of people who say vacuum leak or ignition module.The a/c is also not cooling properly. I can turn the a/c off and the motor picks back up. A few minutes later I turn the air back on and it runs fine for awhile. Thanks for your help.

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  • james1924326 Sep 10, 2009

    ran it without a/c runs fine sound of air only happens when there is a power loss. i'm thinking maybe a clogged converter.
    Thanks for your input

  • Wayne Holden May 11, 2010

    How about trying this without the A/C. Drive down the road and see if it loses power after about the same amount of drive time. As for that "air" the wife is hearing, it may be an exhaust leak caused by a bad exhaust system (has a hole in it) and the catalytic convertor being clogged up, which is causing the engine power problem.


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It sounds like the ac compressor is building up to much head pressure.Check the cooling fans to see if they come on when the ac is turned on.The cooling fan should come on when the ac is turned on.This keeps the head pressure down so the freon keeps cool enough to cool the vehicle.Check the cooling fan,or fans to see if they are working when the ac is on,let me know if I can help you any more.

Posted on Sep 09, 2009

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