I have a 2003 chevy blazer. It guzzles gas when ac is on. Normal gas mileage with it off. Wat's wrong
Aug 3, 2011 at 5:54 PM
Advertisement
ASEMASTER6371
✓Experienced Mechanic
52,796 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
Aug 3, 2011 at 5:57 PM
BROBB56
MEMBER
3 POSTS
it was fine and then fuel pump went bad. Right after it guzzled gas with AC
Aug 3, 2011 at 6:05 PM
STEVE W.
✓Experienced Mechanic
15,373 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?