2003 Ford Explorer Having Idle Problems

Tiny
JERRYLMO
  • MEMBER
  • 2003 FORD EXPLORER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 86,000 MILES
I've got a '03 Ford Explorer Sport Track that has been having idle problems for some time now. The scanner keeps showing No.1 O2 sensor lean and No.2 O2 sensor lean. The IAC motor has been changed, the O2 sensors have been changed, the spark plugs and the coil packs have been changed but the result is the same. I've capped off the brake booster vacuum line and no change. I also capped off one of the other vacuum ports but no change. It idles rough but when you drive it it runs just fine. Any suggestions would be greatly appreciated. Thanks, Jerry
Wednesday, December 31st, 2008 AT 10:10 AM

1 Reply

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi Jerry,

Thank you for the donation.

When the code shows a lean condition, insufficient fuel is being supplied and possible causes are
1. Clogged fuel filter, liines or a weak fuel pump.
2. Injectors.

Since your model is equipped with IAC, vacumn leakages would result in high idling rpm and surging.
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Wednesday, December 31st, 2008 AT 1:16 PM

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