1989 Chevy Cavalier EXCESSIVE GAS USAGE

1989 CHEVROLET CAVALIER
89,000 MILES • 4 CYL • 2WD • AUTOMATIC
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TRAVALINGGRANNY
  • MEMBER
  • 1 POST
WHAT WOULD OR WHY WOULD MY CAR USE EXCESSIVE AMOUNTS OF GAS.
Sep 23, 2008 at 2:07 AM
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RENAUDTN
  • ✓Experienced Mechanic
  • 636 POSTS
There could be many different reasons;
among the most common:

-glogged air filter
-dirty/defective MAF sensor
-under inflated tires
-defective thermostat (stuck open)
-leak in the fuel system
-dirty spark plugs
-restricted exhaust
-bad O2 sensor
-bad coolant sensor

If you've never had a tune up, now would be a good time ;)
Also, if you check your pcm for codes, you may find something of interest.
Sep 23, 2008 at 9:25 AM
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