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Whistling on acceleration and eye burning Rich

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  • Whistling on acceleration and eye burning Rich

    I get this whistling from throttle body on acceleration , high IAC percentage on normal runs, and eye burning rich at idle.

    What cause whistle
    Should IAC go higher after idle?
    Smells really rich at idle

    Ford Roller fresh built 347 Stroker less than 500 mile
    29 lbs. inj.
    43 lbs. fuel pressure
    Mild Cam card attached

    Edelbrock, fuel reg., Edelbrock air filter (pro flow) Edelbrock coil.

    photos attached
    1 at switch on not started
    2 at idle at temp
    3 running
    4 at idle after run
    5 Cam card


    You do not have permission to view this gallery.
    This gallery has 5 photos.

  • #2
    Bump up idle spark timing to 21degrees and check manifold vac. You are at 11-12 " ---that is for a RACE CAM Map.

    AFR's that are 13-14 ARE NOT RICH. Your Set point (target ) is being hit. IF you want to minimize the GAS Stink change Afr to 13.9.

    Record a cell video of the whistle noise---of tablet & can hear the audio at the same time.
    Don't get too caught up in the numbers.
    Just give the Engine what it wants &
    Let the numbers be what they are.

    Jim McFarland....

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    • #3
      did you adjust the throttle blade screw ? per install instructions. in the e-tuner manual it explains what each long /short term fuel is and is doing read that then you will have an idea how to adjust the fuel modifiers.
      Last edited by fleet man; 07-02-2021, 09:05 AM.

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      • #4
        Also, it looks like you may have a bad TPS. When idling, does the "Throttle" ever show 0? If it doesn't, you may need to test it and possible replace it.

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        • #5
          Got a call back from Tech Services, the stayed with me while be got it adjusted, taking it for a run in a few hours, well see how it does.

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          • #6
            Suggest looking for a vacuum leak, with that camshaft you should be pulling more vacuum at idle and at the running condition #3 photo. Would be worth verifying with a vacuum gauge also.

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