I just got a '92 2500 6.5L. When it hasn't been ran for a while, it starts fine and runs good. After it warms up for a while, it starts to run rough. Eventually it will die at a stop light, and it won't start without putting the gas pedal all the way to the floor for a while. Once it starts, it still runs rough for a while then smooths out. Let it cool down for a couple hours, and it will start fine, then dies. Same starting routine as before, then it will stay running. It only has 59,000 miles on it. Just put a fuel filter on it yesterday. Any ideas? I hope it's not the injector pump. Should I try some fuel system cleaner? Any help would be appreciated.
__________________ '07 Classic 2500HD ext. cab
nerf bars
delta diamond plate tool box
back rack
Edge Juice w/attitude
K&N CAI
MBRP 4" turbo back w/5" tip
Moto Metal 16 x 9 (hopefully 285's soon!)
I had a similar probalem with my 6.5 and it was the inline "lift pump" under the drivers seat on the frame. It supplies the injection pump with enough fuel to work properly. The way to tell if its bad is when the problem occurs again remove the fuel filter. Look into the fuel filter housing and have someone turn thr key on while you look in the housing. If its not filling up with fuel chances are its the lift pump. IIRC they are under $100 at a auto parts store.
__________________ Jason 2006 Silverado 2500HD LBZ CC SB Escalade Handles, Front windows tinted to match the rear, painted bumpers, billet grille 4 Kicker 10in Subs in 2 custom box's, Autometer Ultra lite II Pyro and Boost gauges MBRP Turbo Back Stainless Exhaust (Straight piped), w/ stainless tip! PPE Hot+2 285/75/16 Nitto Terra Grapplers on Gear Alloy wheels ****Lost Kitty Reward if found!! 1999 Ford F-550 PowerStroke ''Wrecker'' **Jerrdan bed, S&B Intake
^^^^^x2 on that!!!No PMD on the later ones right,the 6.5's??
__________________ 2006 GMC 2500HD 4x4{cc,sb,SLE} 90/175hp tune,nocat/muff!Naked pic of wife hanging from the rear view.
Goodies waiting for installation!!LBZpowered!!
2002 GMC 1500 [2wd]5.3 power{98k}20 in wheels on!!!LOOK AT AVATAR<<<<
1987 Monte Carlo SS all orig!!89k.....
1978 Malibu [2 dr!!]too far in the $$$ to ever think of selling..[ZZ4 from GMPP coming in March!!] HOT SHOT RIG:2002 GMC Yukon XL***312,674 miles***Hytech tuned,K&N cai[not my choice]...Runs like a whore in church...The left lane was meant to pass,move over or we'll run over your assss!!!P.H.inc. Hot shot 7080let he who touch dis sig die...
^^^^^x2 on that!!!No PMD on the later ones right,the 6.5's??
The black pump driver module? All the 6.5's had them. Its possible thats going bad as well.
If you need one I think I have a spare I'll be putting on ebay soon
__________________ Jason 2006 Silverado 2500HD LBZ CC SB Escalade Handles, Front windows tinted to match the rear, painted bumpers, billet grille 4 Kicker 10in Subs in 2 custom box's, Autometer Ultra lite II Pyro and Boost gauges MBRP Turbo Back Stainless Exhaust (Straight piped), w/ stainless tip! PPE Hot+2 285/75/16 Nitto Terra Grapplers on Gear Alloy wheels ****Lost Kitty Reward if found!! 1999 Ford F-550 PowerStroke ''Wrecker'' **Jerrdan bed, S&B Intake
The black pump driver module? All the 6.5's had them. Its possible thats going bad as well.
If you need one I think I have a spare I'll be putting on ebay soon
What is this and how do I test it? Thanks for all your help.
__________________ '07 Classic 2500HD ext. cab
nerf bars
delta diamond plate tool box
back rack
Edge Juice w/attitude
K&N CAI
MBRP 4" turbo back w/5" tip
Moto Metal 16 x 9 (hopefully 285's soon!)
Its a black box located under the intake on top of the motor. The box contriols the injection pump. Usually the stock box fails due to to much heat. Now you can buy a new one that relocates it to the top of the motor to keep it cool. Im actually not exactly sure how to test it heres the symtoms on another site.
"Symptoms of failure are stalling, hard starting, surging, poor fuel mileage, erratic idle and finally no-start. When they go it usually will not give any codes with the SES (Service Engine Soon) light."
Mine went bad and the truck would shut off while going down the highway
__________________ Jason 2006 Silverado 2500HD LBZ CC SB Escalade Handles, Front windows tinted to match the rear, painted bumpers, billet grille 4 Kicker 10in Subs in 2 custom box's, Autometer Ultra lite II Pyro and Boost gauges MBRP Turbo Back Stainless Exhaust (Straight piped), w/ stainless tip! PPE Hot+2 285/75/16 Nitto Terra Grapplers on Gear Alloy wheels ****Lost Kitty Reward if found!! 1999 Ford F-550 PowerStroke ''Wrecker'' **Jerrdan bed, S&B Intake
Last edited by Tow Master : 06-25-2008 at 11:43 PM.
AutoForums.com is the premier network of enthusiast-owned
enthusiast-operated automotive communities.
We operate more than 100 automotive forums where our users consult peers for shopping information and advice, and share
experiences and opinions as a community.
2006 GMC 2500HD 4x4{cc,sb,SLE} 90/175hp tune,nocat/muff!Naked pic of wife hanging from the rear view.
LBZpowered!!
]
Linear Mode
