2004 Ford Taurus

Tiny
BLUEKATZ
  • MEMBER
  • 2004 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 60,150 MILES
I have a 2004 Ford Taurus with just over 60K for mileage and it has suddenly went from about 29 MPG to about 20 MPG. It's using aprox. 75% more fuel than before. No codes and no performance issues other than rich exhaust smell. It has a new IC module. I wonder if I need to replace both O2 sensors? The FI systme has been cleaned and serviced a couple times already in the last 4 years. By choice. This is the 24 valve DOHC engine. If I need to replace the sensors, where could they be found on the engine? Thanks!
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Saturday, July 19th, 2008 AT 12:53 PM

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Tiny
KHLOW2008
  • EXPERT
Hi bluekatz,

Thanks for the donation.

Rich exhaust smell might be due to a failing catalytic converter or the O2 sensors.

If scanning does not show any code, I would suggest getting it on a diagnostic check. You can check all the components and compare the data to see which is not functioning acording to specifications.

Since you have cleaned the FI system, some thing might have gone out of adjustment and some twinkling is needed to set them right.

Guess work usually leads to a lot of unnecessary replacment and repairs.

The O2 sensors are plugged into the exhaust before and after the catalytic converter.
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Sunday, July 20th, 2008 AT 1:03 AM

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