Guzzles gas with AC on

2003 CHEVROLET BLAZER
112,000 MILES • 6 CYL • 4WD • AUTOMATIC
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BROBB56
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  • 3 POSTS
I have a 2003 chevy blazer. It guzzles gas when ac is on. Normal gas mileage with it off. Wat's wrong
Aug 4, 2011 at 12:54 AM
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ASEMASTER6371
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you need to check a lot. plugs, wires, fuel pressure and filter, air filter. gas mileage has so many variables particularly with driving habits that it is difficult to pinpoint one item.

Roy
Aug 4, 2011 at 12:57 AM
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BROBB56
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it was fine and then fuel pump went bad. Right after it guzzled gas with AC
Aug 4, 2011 at 1:05 AM
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STEVE W.
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Pull the connector plug off of the AC clutch and see if the mileage still changes. This will rule out a bad compressor causing drag.
If the ONLY thing that was done was to replace the pump then I cannot think of any way they are related. Did this start IMMEDIATELY after the swap (like you drove it home and the AC caused low mileage)OR did it happen a week or two after?
Aug 7, 2011 at 2:58 AM
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