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Old 08-03-2011, 11:22 PM   #1 (permalink)
GMC_Diesel4me
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Fuel delivery trouble. code p0087

Hi guys. Im hoping somebody can help me out. On a couple different towing trips Ive had trouble starting the truck after it has been turned off for a short while. On the last trip the check engine light came on but still ran good until I stopped for gas and it wouldn't start again. I had to get towed. So a buddy of mine came over and pulled the code p0087.However the truck started again after trying for 2 days. The trouble has not been fixed. On previous times I was able to open the bleeder on the fuel filter assembly and prime it and it would work, but not the last time. Fuel filter was replaced 5k ago.I went about a month and a half without problems between towing trips. Now my question is what do you think it could be? Should I try replacing the filter again and is there a second filter I should replace? Maybe fuel pump? Is the pump on the lly in the tank? Any feedback will be appreciated very much. Thanks for your time.
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Old 08-04-2011, 07:41 AM   #2 (permalink)
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There is no fuel pump in the tank, only the CP3 injection pump on the motor. Change the filter just to eliminate that as a cause. Then you need to check the system for air leaks. It sounds like its loosing prime, which would explain the low rail pressure code. Check especially well around the filter head and WIF sensor, those are common leak points
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Old 08-04-2011, 11:29 AM   #3 (permalink)
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Thanks. Thats where I will start. Is there a secondary fuel filter that I should check?
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Old 08-04-2011, 11:33 AM   #4 (permalink)
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Unless you've added one, there's only the one under the hood, and no sock on the pickup in the tank
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>2005 Chevrolet 2500HD Crewcab Shortbox 4X4 Duramax LLY/Allison<
Black, LT Trim, Gray Heated Leather, Sunroof, XM Bose Radio, Automatic Climate Controls
Full MBRP 4" Exhaust w/6" Tip, MBRP Downpipe, EGR Blocked (FE9 Emissions), PCV Rerouted, Resonator Blocked, AFE Mouthpiece, Edge CTS Insight, Banks Intake w/Scoop, Nicktane Filter Adaptor w/CAT 1R-0750 Filter, Bilstein 5100's, 2006+ Towing Mirrors, GM Tubular Chrome Step Bars, GM Bug Guard and Window Shields, Spray in Bedliner, Dually Rear Light Bar, 265/75R16 Goodyear Silent Armors on stock rims, Superglide 16k Fifth Wheel Hitch, Tekonsha P3 Trailer Brake Control

>2011 Honda CR-V EX-L<
Opal Sage, Tan Heated Leather, Factory Navigation

>2012 Kubota BX1860 Tractor<
LA203 Front Loader, 54" Mid-Mount Mower, 18HP 3 Cylinder Diesel

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Old 08-04-2011, 11:40 AM   #5 (permalink)
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Thanks for your time.
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Old 08-06-2011, 12:06 AM   #6 (permalink)
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Just replaced the fuel filter. Tomorrow I will replace the gas cap. Just starting with the cheap easy stuff. Unfortunately I will not be towing for awhile to see if I throw the p0087 code again.
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Old 08-06-2011, 12:11 AM   #7 (permalink)
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I doubt replacing the fuel cap will change anything. IMO you have a leak in the fuel system
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>2005 Chevrolet 2500HD Crewcab Shortbox 4X4 Duramax LLY/Allison<
Black, LT Trim, Gray Heated Leather, Sunroof, XM Bose Radio, Automatic Climate Controls
Full MBRP 4" Exhaust w/6" Tip, MBRP Downpipe, EGR Blocked (FE9 Emissions), PCV Rerouted, Resonator Blocked, AFE Mouthpiece, Edge CTS Insight, Banks Intake w/Scoop, Nicktane Filter Adaptor w/CAT 1R-0750 Filter, Bilstein 5100's, 2006+ Towing Mirrors, GM Tubular Chrome Step Bars, GM Bug Guard and Window Shields, Spray in Bedliner, Dually Rear Light Bar, 265/75R16 Goodyear Silent Armors on stock rims, Superglide 16k Fifth Wheel Hitch, Tekonsha P3 Trailer Brake Control

>2011 Honda CR-V EX-L<
Opal Sage, Tan Heated Leather, Factory Navigation

>2012 Kubota BX1860 Tractor<
LA203 Front Loader, 54" Mid-Mount Mower, 18HP 3 Cylinder Diesel

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Old 08-06-2011, 12:45 AM   #8 (permalink)
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Thats what Ive been hearing. I put the new filter on and inspected the wif sensor and made sure the o rings went in good. Then checked around the fuel filter head and all looks good. I looked at the fuel lines and I dont see any visible trouble. Do you know where thes lines collapse that Ive read about on these posts. Im starting to worry about some of these posts where this problem in a nightmare and its hard to duplicate unless your towing up a grade. Oh yeah,I also could not resist cutting open the filter I took off. I was definitely dirty with 6k on it, but i didnt see any particles in it.
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Old 08-07-2011, 11:24 PM   #9 (permalink)
dmtcm
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The fuel hoses that they are having troubles with are located under the driver's side where the fuel lines run from the frame over to the engine. There are hoses connected between the steel lines. Claim is that these hoses can collapse over time and cause a lack of fuel which trips the low rail pressure code.
Installing an aftermarket fuel pump in-line after the tank would cure alot as the high pressure pump would not have to pull the fuel some 20 feet from the tank to the engine.
If a leak is your problem, changing the fuel cap won't help. Won't hurt it either.
Another possible problem that I have run into a few times is people who live on or drive on loose rock roads alot. I have found damage to the return fuel cooler in front of the fuel tank. It can get pin holes in the core from the rocks flying off of the tires. There is also a TSB about the 1/2" supply hose coming from the tank to the steel fuel line above the fuel cooler. Older models had a rubber hose where the new ones have a plastic hose.
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Old 08-07-2011, 11:30 PM   #10 (permalink)
Black05Duramax
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I had the same problem with my truck a few times when I had someone else change my fuel filter. Sometimes the plastic WIF sensor on the bottom is tightened too tight. It gets a very small crack in it and will bleed the pressure off. Shut the truck off and watch it very close for a few minutes after shutting the truck off and see if it's leaking.
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