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Thread: 2003 Supercharged Marauder Fuel issues

  1. #1
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    2003 Supercharged Marauder Fuel issues

    Have a Supercharged Marauder that I recently put dual 340 fuel pumps in. Updated fuel module for dual pumps and still having issues with fuel delivery. Car showing codes for fuel system pressure. Figure something from the fuel module not making it to the ECM and the ECM can't resolve. Putting car in limp mode. Anybody running a similar system that might know where to go from here.

  2. #2
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    Stock FPDM? Or did you add a 2nd one
    2004 SB Ported Trilogy 48
    Has supporting mods and stuff
    Thanks to Marty O for his help in updating this car.

    R.I.P.
    Rex "SC Cheesehead"

  3. #3
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    Do a wiring upgrade and dual non modified FPDM's

  4. #4
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    Installed a Fuel pressure module built for dual fuel pumps

  5. #5
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    Can somebody map out the process of how the fuel pressure module regulates pressure without a pressure regulator and tells the ECM how much pulse to put at the injector. I feel that the ECM is getting the wrong signal from the fuel module. This causes the ECM to put the car in limp mode. Due to a strong gas odor from the engine oil I feel the injectors are flooding the cylinders and diluting my oil at the same time.

  6. #6
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    Your ECM is fine. Your using 2 high pressure, high draw pumps.
    Trust me. Your modified FPDM is going nuts with those 2 high draw pumps.
    Do the wiring upgrade first. It will help a lil. Dual FPDMs is the key tho

  7. #7
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    Do you have to re-map the ECU wHen running modified fuel pump modules?

  8. #8
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    There is no "remap" for a modified FPDM. A modified driver module doesnt need anything tune related.

    I dont like going in circles. You'll figure it out sooner or later.

  9. #9
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    I’d be looking into the FRPS. Could be it has failed and you are running pig rich.


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    Cobra short block / ProCharger F1-A / Cog drive upgrade / Manley valves / Brian Tooley Racing valve springs / 80# inj. / -8 fuel line / -6 return / Aeromotive 340 pumps and regulator / 2012 GT500 TR6060 six speed / twin disc clutch / Driveshaft Shop GT500 upgraded CV joint shaft / BA5000 blow thru MAF/ 4.10's / Ford Racing 31 spline set up and Girdle / Metco D.S. safety loop / Stainless Works headers, cats, and everything else out back / ClassGlass hood / Bob's hood strut mod / Hurst line lock / Metco control arms / Addco front and rear sway bars / Monroe severe duty shocks all around / Race concepts rotors / Badgeless grille / 35% tint / FBM's interior LED kit and ambient lighting kit / Pioneer FB700 deck / kenwood speaker 4 Ch. / Rockford Fosgate 10" sub and amp / Kicker 6 X 8's all around / back up cam / bluetooth / Pioneer Xm / 704 RWHP 603 RWTQ tuned by Mo's Speedshop.

  10. #10
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    yep most likely your frps is leaking and hosing down the engine. Ive seen several engines die that way.

    see 4 posts up ^^

    btw, if your making less than 600rwhp you can simply swap out the stock pump for a stock coyote pump, no need to mess with the fpdm or anything else


    but to answer your question, the fpdm does not give any pressure to the ecu. The frps tells the ecu what pressure the rail is at and the ecu modulates the fpdm duty cycle to deliver the desired fuel pressure it wants.
    '03 Marauder 300A - 87 Octane Race Tune
    O&E Speed Shop - 2333 Aberdeen St. Kenner, LA
    EFI Calibrator - decipha @ EFIDynoTuning
    http://www.efidynotuning.com/tune.htm

  11. #11
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    The tune does need to be adjusted for the higher flow fuel pumps. But there are many other opportunities for problems, too.
    Thanks to Darrin @ BC Automotive:
    $1800 and it was worse than when he started!

    Brian (FordNut) FPG # 1458 of 7838
    03 MM 300A (Lotsa mods, 130k mi) was 303rwhp/318rwtq N/A
    then 476/410 D1SC ProCharged on stock block
    then 660/555 D1SC PC on 5.3 wet sleeved Teksid alum big bore stroker
    then 365/369 N/A on 5.3 wet sleeved Teksid alum big bore stroker
    Now 751/617 3.4L Whipple on 5.3 Boss5.0 iron big bore stroker

    03 MM 300B Silver (Mostly stock, wife's car, 300k mi) FPG # 7053 of 7838 or 49 of 417 SB
    03 MM 300B Silver, Stock, 50k mi FPG # 7134 of 7838 or 89 of 417 SB
    01 F150
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    68 Stang FB (70 351C 4V, 4 wheel discs, project car)

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