2002 Ford Taurus Fuel Mix Too Rich + Sluggish start

2002 FORD TAURUS
106,000 MILES • 6 CYL • 2WD • AUTOMATIC
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DARTHSABBATH
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  • 1 POST
Recently my Taurus would not start. After awhile, we were able to get it started and taken to the mechanics. He replaced one of the rear oxygen sensors and the fuel filter. He also put in some fuel injector cleaner. However, we are still getting an intermittent sluggish start and a check engine light indicating that the fuel mix is too rich. We've taken it back to the mechanic and he is scratching his head over what it could be. As near as we can tell, the Check Engine code is still pointing to the same O2 Sensor.

We're almost at a point of giving up, but were hoping to find some additional advice on how to continue troubleshooting this problem.

Thanks for any info you might be able to provide.
Feb 10, 2010 at 5:51 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Possible O2 sensor wiring or the computer itself to include excessive fuel pressure (bad fuel pressure regulator or plugged return line), leaky fuel injectors, dirty air filter or restricted air inlet, or a defective coolant sensor that prevents the engine management system from going into closed loop mode
Feb 10, 2010 at 6:39 PM
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