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hello i have a chevy 305 k1500, when the ac compressor is on my engine (at idle) dips RPM real low and then spikes back up. when stopped and slowly climbs in RPM to go and the ac is on engine surges, runs rough, and sometimes almost shuts off. when i turn off the compressor engine seems to run like new. any ideas why this would be?
 

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hello i have a chevy 305 k1500, when the ac compressor is on my engine (at idle) dips RPM real low and then spikes back up. when stopped and slowly climbs in RPM to go and the ac is on engine surges, runs rough, and sometimes almost shuts off. when i turn off the compressor engine seems to run like new. any ideas why this would be?
Possible that the AC compressor is going out or the AC system is overcharged. Have the system checked.
 
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