Duramax Diesels Forum Truck of the Week
Old 06-03-2018, 07:31 PM
SlyMcBean SlyMcBean is offline
Join Date: Jun 2018
Location: Willis texas
Posts: 6
Talking Help with 2002 LB7 codes

There is a local diesel shop thatís been recommended by a handful of people I know that I plan on taking the truck to for diagnostics tomorrow or Tuesday. I did pull the codes and I have some info on the truck from the ex owner. Itís a 2002 Silverado 2500HD 4x4 with 270,000 on it. The engine starts easily, idles like a sewing machine and covered about 350 miles on a full tank. To my knowledge there is not much mod work other than a KN cold air intake.
If I floor it or depress the accelerator more than halfway the truck slows down/loses power and blows a nice plume of black smoke on whoever is behind me. From 500-2000 rpms it pulls great but once you pass that it loses power. I can drive it all day with very little smoke but if I get on the highway for an extended period of time, once I decelerate a CEL pops up and pulls a current code for P0087 and P1094 and will really run terrible until I allow it to sit a minute.

The fuel filter has about 4000 miles on it and I did use the priming procedure I found here.

It has thrown some intermittent codes for P0102, P0113, P0234, P1093.

Any advice or insight would be appreciated. Signs seem to be pointing to the fuel pressure regulator or injection pump. Iím pretty handy with tools having grown up in my grandads junkyard. I have zero diesel experience though. Are these tackle yourself repairs or things that should be left to a shop? One of my neighbors who claims to be very diesel savvy told me that the truck wouldnít idle so smoothly with a failing FPR (I have no way of verifying this but he once told me he smoked out with Tupac so Iím leery) .
Reply With Quote
Old 06-03-2018, 08:06 PM
TheBac's Avatar
TheBac TheBac is offline
Why do I keep doing this?

Join Date: Apr 2008
Location: Mid Michigan
Posts: 11,946


I moved this post into the LB7 area as it's tech related, not part of your intro. That way other members can help you out.
Good luck to you.
"BBT" -- 2003 GMC CC/SB 4x4 12.14@111.15
"The Cruzer" -- 2014 Chevy Cruze Diesel -- the fun little DD
"Kleshay" -- 2000 C5 Corvette -- the toy
"The Bigger Boat" -- 2011 Workhorse P700 - 6.0LS/Allison - what I drive at work

Two wrongs dont make a right, but three rights do make a left.

Reality is a matter of perspective.

This forum isn't for the weak of heart.....or wallet.

"Lets build a race car they said. Itll be fun they said. I don't know who "they" are.........but they need a good punch in the face!" -- mufflerguy (yb)
Reply With Quote
Old 06-03-2018, 10:05 PM
2004LB7's Avatar
2004LB7 2004LB7 is offline
Join Date: Dec 2010
Location: Norcal
Posts: 1,353


I would start with replacing all of the rubber fuel lines in the engine bay. You may be experiencing a fuel line collapse. If that doesn't work it is possible your CP3 is worn out.

For your other codes, since you have a K&N filter, start with cleaning the maf sensor. It looks like it could be electrical related too
2008 Chevrolet 3500HD DRW LTZ
285/75/17 Nitto Dura Grapplers, 4.56 gears, Front and rear ARB lockers, Efi Live tuning by me, Raptor 160 LP, Cognito 4-6 NTB Lift, 4" Exhaust, Built Trans by Mike L.

2006 BRM Jetta TDI. Injectors, turbo, Malone custom tuning on ecm and tcm
Reply With Quote
Old 06-04-2018, 05:35 AM
SlyMcBean SlyMcBean is offline
Join Date: Jun 2018
Location: Willis texas
Posts: 6

Thank you TheBac
Reply With Quote
Old 06-04-2018, 07:45 AM
SlyMcBean SlyMcBean is offline
Join Date: Jun 2018
Location: Willis texas
Posts: 6
Default Fuel lines

Thanks 2004, Iíll start today with those rubber fuel lines.
Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -7. The time now is 07:02 AM.

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.