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Hey Cort==The a/c compressor draws about 10 horsepower. At idle your engine is developing about 30 hp so you are taking about 1/3 of it for the compressor. You may have switch problems on the compressor causing it not to work in some positions. GoodluckJoe

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โˆ™ 2004-07-09 10:08:47
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Q: Why would a 78 Mercedes 280CE run fine when the AC's off but sounds like its putting pressure on the engine when it is on?
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