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Guzzles gas with AC on

Tiny
BROBB56
  • MEMBER
  • 2003 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 112,000 MILES
I have a 2003 chevy blazer. It guzzles gas when ac is on. Normal gas mileage with it off. Wat's wrong
Thursday, August 4th, 2011 AT 12:54 AM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
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
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Thursday, August 4th, 2011 AT 12:57 AM
Tiny
BROBB56
  • MEMBER
  • 3 POSTS
It was fine and then fuel pump went bad. Right after it guzzled gas with AC
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Thursday, August 4th, 2011 AT 1:05 AM
Tiny
STEVE W.
  • MECHANIC
  • 13,414 POSTS
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?
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Sunday, August 7th, 2011 AT 2:58 AM

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