Losing Rail Pressure - Chevy and GMC Duramax Diesel Forum
01-04.5 LB7 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #1 of 5 (permalink) Old 01-23-2013, 06:03 PM Thread Starter
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Join Date: Jun 2010
Location: Clearfield, PA
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Losing Rail Pressure

This problem developed this morning on my way to work. Im not exactly sure what attributed to it could have possibly been the -4 temperature but its hard to say. Anyhow the truck idles and runs fine until the fuel rail pressure hits around 22 or 23 kpsi and then it falls flat on its face to 3 kpsi. Im kind of hoping its a fuel filter or something simple like that but didnt have time to get one after work tonight. I typically run my tune on stage 3 and even tried setting it back to stock and the problem still occurs. If anyone has any insight it would be greatly appreciated. I did a few searches on the forum and couldnt really find anything similar to what mine is doing.
The truck is a 2003 LB7 with a edge evo tune on it

2003 Chevy 2500HD LB7
5" MBRP Turbo Back
Banks Ram Air
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post #2 of 5 (permalink) Old 01-23-2013, 06:20 PM
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Location: Bellingham, Wa
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This is why I carry a FF under my back seat. Possible you got a clogged FF or bad fuel.

01 LB7 EC/SB Ally 4x4
DD: 1990 4runner completely stock 4x4 3.slow

2007 Yukon Denali - Hers

Big Thanks To Adrenaline Truck Performance, Alligator Diesel PerformanceSocal Diesel and Lincoln Diesel Specialties
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post #3 of 5 (permalink) Old 01-24-2013, 09:06 AM
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could it of jelled up? mine did the same thing

2004 lb7, 4 inch straight exhaust, K&N cold air
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post #4 of 5 (permalink) Old 01-24-2013, 09:12 AM
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sounds like jelling

-2012 DENALI 1500

-2006 GMC CCSB LBZ --Sold--


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post #5 of 5 (permalink) Old 02-02-2013, 09:50 AM
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Location: xenia ohio
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my 01 has been doing that for a few weeks. new fuel filter, fresh fuel. cant figure it out

2001 chevy ext. cab long bed. intake mod ppe boost valve. 4" DIMOND EYE DOWNPIPE BACK
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