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It's the a/c. When on it decreases the power from the engine because of the extra accessory that is now engaged on the drive belt.
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I assume you meant the pulley spins freely, lol. The AC compressor clutch engages and starts turning the compressor when AC is needed.It's a mechanical draw more than an electrical draw. When disengaged the compressor spins freely then once engaged the engine belt has more rotational mass to turn.
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Yes lol sry for being unclearI assume you meant the pulley spins freely, lol. The AC compressor clutch engages and starts turning the compressor when AC is needed.
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You also have a 2.2 in the Cobalt. Bigger engine more hp = less draw on powerSome cars seem to be affected more from the A/C than others. My Cobalt surprisingly doesn't get affected much and the A/C works great. If only the front end was built as good as the A/C.
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