why Fuel whooas

Discussion in 'Fox 5.0 Tuning' started by Mustangr, Feb 23, 2009.

  1. Mustangr Founding Member

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    Just had it dyno tuned was running great and now..... Just coming into power band boost starts to increase then it starts holding back. I see fuel pressure fall off completly. If I stay in the throttle it backfires it surges badly.
    what gives internal pump maybe T-rex filter Hmmm
    Mustangr, Feb 23, 2009
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  2. millhouse Founding Member

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    Any drop in fuel pressure would typically indicate a problem with either the pumps or the filter. Either pumps would be adequate for your power levels by themselves…..so I would first look into replacing the fuel filter.

    What is your base pressure set at? What fuel pressure regulator are you running?
    millhouse, Feb 24, 2009
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  3. Mustangr Founding Member

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    I found a couple problems. Open Vacum and a kink in return fuel line. Opps
    Mustangr, Mar 1, 2009
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  4. Black1987Stang New Member

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    So all is good now? what was wrong?
    Black1987Stang, Mar 14, 2009
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  5. Mustangr Founding Member

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    I dont know. Now the brand new MSD distributor that I got with the Accel DFI kit is now faulty..I had to return it to MSD. We will see. I want to get the
    Stealth kit from Aeromotive. Has anyone had problems or info about it.
    Mustangr, Mar 15, 2009
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