Fuel issues

2001 FORD EXPLORER
249,431 MILES • 4.0L • V6 • 4WD • AUTOMATIC
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AUSTIN543233
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Just changed the fuel filter because got codes for lean on bank one and 2. When I took fuel filter out it was filled with brown fluid. Still giving me code for lean on bank one and 2? Also the air entering engine at idle is at 100%, is that normal? Any advice would help and I also have used a fuel system cleaner before the fuel filter replacement.
May 31, 2019 at 6:14 PM
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DANNY L
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Hello, I'm Danny.

Can you send me the code number first?Would help in diagnosis. Thanks for using 2CarPros.
Danny-
May 31, 2019 at 7:07 PM
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AUSTIN543233
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Bank one code is P0171, but the second one keeps coming on and off. also it says the air entering engine at idle is 100%. does that mean there is an vacuum leak?
May 31, 2019 at 7:19 PM
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DANNY L
  • AUTOMOTIVE REPAIR CONTRIBUTOR
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Hello again,

Yes, it sounds like a vacuum leak. I've attached a picture below of things to check.Hope this helps and thanks again for using 2CarPros.
Danny-
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May 31, 2019 at 7:34 PM
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AUSTIN543233
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Thank you for the information.
May 31, 2019 at 10:39 PM
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DANNY L
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 5,648 POSTS
You're welcome! Let us know how things turn out, or feel free to ask any further questions. Thanks again for using 2CarPros.
Danny-
May 31, 2019 at 11:34 PM