2004 Mercury Marquis CHECK ENGINE LIGHT ON

Tiny
WAUKEGAN
  • MEMBER
  • 2004 MERCURY MARQUIS
  • V8
  • 2WD
  • MANUAL
  • 127,000 MILES
HAD IT CHECK BUT WHAT DOES FUEL TO RICH FOR SYSTEM MEANS
Monday, April 5th, 2010 AT 10:30 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,192 POSTS
All engines require both fuel and air to run. If the fuel is too rich, that basically means you are getting too much gas and not enough air. Is the air filter plugged? Also, did any codes come up for an O2 sensor or temp sensor?
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Thursday, June 10th, 2010 AT 7:41 AM

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