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Check for a main vacuum leak. Do you feel a loss of power at idle? The A/C and defrost (which uses the A/C) require power from the engine. If it can handle the accessories (A/C, Defrost) it will shut off. Also the Power Steering strains the engine, does it shut off when you turn the wheel all the way? If so check for a vacuum leak. If the engine is idling rough, get it fixed.

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โˆ™ 2005-09-29 00:27:44
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Q: What causes your 83 Chevy caprice to shut off while running the air conditioner or heater?
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