Duramax Diesels Forum Truck of the Week
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Old 08-15-2009, 05:52 PM
Dee7795 Dee7795 is offline
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Default Fuel Rail Pressure Problems

I have a 02 GMC Duramax Diesel 2500 HD Extened Cab truck.With 96,000 miles.
I replaced the fuel pressure regulator 3 weeks ago. The truck drove fine until last Thursday. I'm getting the same symptoms of the regulator but I don't think it can go bad in 3 weeks.(right?) What other possibilites could it be. I replaced the fuel filter in July, and had the injectors done last year. How had is it to change the fuel rail pressure sensor, and where is it located? anyone have pics.

Thanks for any info and or Help.

Dee7795
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Old 08-15-2009, 10:21 PM
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I don't want to mislead you but when I had my 02 when it started having rail codes popping up, my injectors went out about 2 weeks after that. Are you running a big program, any lift pumps?
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Old 08-15-2009, 10:39 PM
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Moved Here!
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Old 08-15-2009, 10:41 PM
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What exactly is the problem you are seeing? Too high of rail pressure? Too low?
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Old 08-17-2009, 01:50 PM
Dee7795 Dee7795 is offline
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I am getting high fuel rail pressure
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Old 08-17-2009, 01:53 PM
Dee7795 Dee7795 is offline
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Quote:
Originally Posted by SteveFord View Post
I don't want to mislead you but when I had my 02 when it started having rail codes popping up, my injectors went out about 2 weeks after that. Are you running a big program, any lift pumps?
Thanks for your honesty, but truck is completely stock
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Old 08-17-2009, 08:36 PM
superpro56 superpro56 is offline
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Check all the wires to the regulator. I hear if they loose connection with the ECM the regulator defaults out to max rail pressure.
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2002 Silverado LS 2500HD CC/SB, EFI Live V2 DSP5 by Duramaxtuner, Big Dipper trans w/PI converter, Banks Technicooler, Danville LBZ CP3 w/modded regulator, 4" MBRP all stainless exhaust with 6" tip, K&N filter, Kennedy boost controller, Air Dog 150, Kennedy Billet Pickup and custom bulkhead fittings, Intake horn mod, SD manifold, resonator blocked, Autometer Cobalts on the A-pillar (fuel press, boost and pyro), Recon smoked cab lights and smoked 3rd brake light, Bilsteins, Westin stainless step bars, ExtangRT Tonno, Tecumseh brake controller, Husky liner floor mats, Line X OTR, Lund stainless cold front grill cover

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Old 08-18-2009, 10:14 AM
Dee7795 Dee7795 is offline
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Quote:
Originally Posted by superpro56 View Post
Check all the wires to the regulator. I hear if they loose connection with the ECM the regulator defaults out to max rail pressure.
Thanks I'll do that.
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  #9  
Old 08-30-2009, 05:29 PM
Dee7795 Dee7795 is offline
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Hey,
my problem was a broken wire in the wiring harness going to the fuel pressure regulator.
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