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Thread: Stealth Ram - Do I have a Bad Fuel Pressure Regulator?

  1. #11

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    Thanks for the info. I believe it’s got to be the regulator. It's 34°F in the garage today and the fuel pressure reading got up to 27 psi today and that’s where it stayed. When you say the regulator that you linked me to has an adapter for the Holley fuel rail what do you mean? Does it mount remotely with a connector to the fuel rail? Thanks much. Bill

  2. #12

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    Bill, I'd simply replace the unit you have and keep the regulator on the rail. Holley sold thousands of systems with that arrangements.
    IG @projectgattago
    I offer remote Holley EFI tuning.
    I deliver what EFI promises.
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  3. #13
    Join Date
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    27,478

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    Yes, of course. There's nothing wrong with that style fuel pressure regulator (used on many turbo Buick Regal & Grand Nationals). See post #4.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS T/W 11R 205 heads, 232°-244° duration/.623" lift/114° LSA camshaft, 12:1 C/R, TFS R-Series FTI ported intake, BBK 80mm T/B, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 200A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, -6AN fuel system plumbing, Walbro 255 LPH pump, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/3000 RPM converter, B&M Hammer shifter, FPP aluminum driveshaft, FPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 M/T Street Comp tires.

  4. #14

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    Hello, I'm making progress I think. I replaced the regulator and now I have 37 psi pressure shown on the sensor at the ECU. After checking the timing by eye because the timing light won’t trigger while cranking (another thread) I got brave enough to connect the injectors and tried starting the engine. It sputtered a few times while cranking, but would not continue running. There was no back popping of any sort. This prompts a couple more questions.

    First, I'm at 5500 feet altitude. Would that be likely to cause the lower fuel pressure reading from the regulator since it compensates for manifold pressure?

    Secondly, should I reset the Global File for 37 psi fuel pressure instead of 43 lbs where it is set now? If the ECU is setting the injector timing for 43 psi then I assume it could be starving for fuel.

    Finally, the ECU shows an IAC position at 58%. Is this a normally good starting point? Thanks once again for any replies. Bill

  5. #15

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    @BillW: Being at altitude presents some tuning issues. If I can be of service with the tuning, let me know. Andrew

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