1999 Ford Taurus backfiring

Tiny
PREACH128
  • MEMBER
  • 1999 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 190,000 MILES
I have had this car about 2 months. It runs rough when you first start it up. And when you start moving in it with the engine cold, it backfires up front.I had it checked for codes and it showed up the O2 sensor Bank 1 sensor 2.I had that replaced, as well as a vacuum line with a whole in it.I also had the plugs and wires checked. It clears up on its own after we are on the road a short time. But I know with it running like that for that short time is probably why it gets less than 16mpg Any solutions? I have the 3.0 engine with the U engine code
Saturday, March 27th, 2010 AT 1:46 PM

1 Reply

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
The exact sensor code would be helpful there are several codes for O2's, but during warm up the O2 isn't used! Your problem could be a dirty MAF, a weak ECT(engine coolant temp) sensor. Or a fuel pressure problem. The ect is only about $20.00 and just screws in and out, replace it when the motor is cold.
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Saturday, March 27th, 2010 AT 2:05 PM

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