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2003 Chevy Cavalier The car is starting to get had on Gass

Tiny
CHEVY21
  • MEMBER
  • 2003 CHEVROLET CAVALIER
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 82,000 MILES
Hi there my cavalier, is atarting to get very hard on gass. I have put new plugs in it, and it has seamed to help alittle, but the tail pipe is starting to get realy black like it is running rich, any ideas, before I start the senser game?
Thursday, February 26th, 2009 AT 1:53 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
Hi:
If the check engine light isn't on, it's hard to say if it's even a sensor. Make sure there are no vacuum leaks. Also, if the tail pipe is getting black, that indicates a rich fuel mixture. You may want to check the O2 sensor.

Let me know what you find.

Joe
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Thursday, February 26th, 2009 AT 6:09 PM
Tiny
CHEVY21
  • MEMBER
  • 2 POSTS
Yes the engine light is on.
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Friday, February 27th, 2009 AT 12:38 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
Hi:
If the check engine light is on, then you need to have it scanned for codes. Otherwise, we will be guessing the entire time. Most nationally recognized parts stores will scan it for free, so I recommend taking it there to have it done. There will be no out of pocket money spent, and it may provide our answer.

Let me know what you find.

Joe
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Friday, February 27th, 2009 AT 1:46 PM

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