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Thread: Lean Problem

  1. 12-16-08, 10:49 PM #1
    ThePunisher95
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    Lean Problem

    So my car Wide band goes very lean!! Under 2k rpms it will sometimes go all over the place from lean to rich which is normal but once I pass 2k rpms no matter what I do it goes lean enough to were the wideband cant read which is 17:1. I cant go full throttle and about 15 mph in forth gear and go wot and under 2k rpm its lower than 10:1 but once it goes about 2k or over it goes over 17:1 were the wideband cant read no more. Were do I start????
    04' F150 Supercrew
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  2. 12-16-08, 11:17 PM #2
    fazm
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    check fuel pressure, fuel filter, and check the fuel pressure regulator.
    2005 v6 redfire mustang. yup its slow.
    12.03 @ 118.5 best et
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  3. 12-16-08, 11:21 PM #3
    DannyStyle22
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    Quote Originally Posted by fazm View Post
    check fuel pressure, fuel filter, and check the fuel pressure regulator.

    I agree.
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  4. 12-17-08, 11:45 AM #4
    ThePunisher95
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    How Do you check the the fuel pressure regulater???
    04' F150 Supercrew
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  5. 12-17-08, 11:56 AM #5
    BurnTire
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    Quote Originally Posted by ThePunisher95 View Post
    How Do you check the the fuel pressure regulater???
    Do you have a blower on the car?
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  6. 12-17-08, 12:03 PM #6
    ThePunisher95
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    Yes. A vortech
    04' F150 Supercrew
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  7. 12-17-08, 12:07 PM #7
    BurnTire
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    Fuel pressure gauge? Are you running an FMU or just large injectors?
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    2004 Cobra, Whipple ,TH-400
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  8. 12-17-08, 12:13 PM #8
    ThePunisher95
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    Not yet. Gonna get the Tweecer to tune it. And I have a AEM Wideband. Im working on the fuel pressure gauge...
    04' F150 Supercrew
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  9. 12-17-08, 12:27 PM #9
    99WhiteGT
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    This happened to me. Check your fuel pump, thats what was wrong with mine.
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  10. 12-18-08, 09:45 PM #10
    ThePunisher95
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    49 lbs of fuel pressure and a new fuel filter. Still having the same problem
    04' F150 Supercrew
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