Utah Smitty
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Hi, All
I have a 1996 K2500 GMC, extended cab long bed. 184,000 miles, 4LE80 transmission, 4.10 differentials. The truck was owned by a farm in northern Idaho, and needed a lot of "corrective action" to resolve some benign neglect. The previous owner had a new injection pump installed, but not sure at what mileage.
I've done the following to it so far:
Work done late last year
- Installed air cleaner from K3500
- Installed aluminum radiator, high flow water pump for 2000 model year, Duramax Fan and new Hayden clutch, and Fluid Dampr
- Installed new engine oil cooler lines.
- Removed vacuum pump and installed manual spool stick (home made)
- Installed new timing chain and sprockets
- Replaced the "tuna can" near the turbo (forget what it's called)
Work done in the last month:
- Installed pre-pump filter and Raptor fuel pump from LeRoy diesel
- Installed Feed the Beast system from LeRoy Diesel
- Installed fuel relay bypass circuit from LeRoy Diesel
- Installed new pickup assy in fuel tank and removed strainer "sock"
- Run 1/2" hose from tank to beyond Raptor pump
- Removed soot trap and installed 4 inch exhaust
- Moved PMD heat sink from top of engine to driver's side fender and installed new Flight Systems PMD
The mechanic that did some of this work last year also tweaked the timing on the pump--he said the bolts were loose and it was out of time.
Here's my issue:
I didn't notice anything at the time, but for the last couple months I've noticed the truck will start and run fine, but then seems to go into "limp" mode and hardly accelerates, even on level ground. I don't notice any black or blue smoke, etc. although sometime the coolant temperature goes up quickly.
I had planned to put a 4 inch exhaust on it anyway, but the rest of the recent work was done to try and correct the problem... I assumed it wasn't getting enough fuel. However, the problem still persists, even on an empty truck on level ground. The EGT used to go up more before I upgraded the fuel system. Now it stays in the 700-800 degree range.
One other thing, the Antilock light came on about 3 months ago... I haven't looked into finding the cause, yet.
I've run out of ideas as to what is causing the problem.
I talked to LeRoy about it and he recommended I find someone in the local area. I'm in northern Utah, and he said there was someone on this site in the local area (Pavel?) that might be able to help me.
Can anyone give me a hand or at least let me know where to look next?
Thanks,
Smitty
I have a 1996 K2500 GMC, extended cab long bed. 184,000 miles, 4LE80 transmission, 4.10 differentials. The truck was owned by a farm in northern Idaho, and needed a lot of "corrective action" to resolve some benign neglect. The previous owner had a new injection pump installed, but not sure at what mileage.
I've done the following to it so far:
Work done late last year
- Installed air cleaner from K3500
- Installed aluminum radiator, high flow water pump for 2000 model year, Duramax Fan and new Hayden clutch, and Fluid Dampr
- Installed new engine oil cooler lines.
- Removed vacuum pump and installed manual spool stick (home made)
- Installed new timing chain and sprockets
- Replaced the "tuna can" near the turbo (forget what it's called)
Work done in the last month:
- Installed pre-pump filter and Raptor fuel pump from LeRoy diesel
- Installed Feed the Beast system from LeRoy Diesel
- Installed fuel relay bypass circuit from LeRoy Diesel
- Installed new pickup assy in fuel tank and removed strainer "sock"
- Run 1/2" hose from tank to beyond Raptor pump
- Removed soot trap and installed 4 inch exhaust
- Moved PMD heat sink from top of engine to driver's side fender and installed new Flight Systems PMD
The mechanic that did some of this work last year also tweaked the timing on the pump--he said the bolts were loose and it was out of time.
Here's my issue:
I didn't notice anything at the time, but for the last couple months I've noticed the truck will start and run fine, but then seems to go into "limp" mode and hardly accelerates, even on level ground. I don't notice any black or blue smoke, etc. although sometime the coolant temperature goes up quickly.
I had planned to put a 4 inch exhaust on it anyway, but the rest of the recent work was done to try and correct the problem... I assumed it wasn't getting enough fuel. However, the problem still persists, even on an empty truck on level ground. The EGT used to go up more before I upgraded the fuel system. Now it stays in the 700-800 degree range.
One other thing, the Antilock light came on about 3 months ago... I haven't looked into finding the cause, yet.
I've run out of ideas as to what is causing the problem.
I talked to LeRoy about it and he recommended I find someone in the local area. I'm in northern Utah, and he said there was someone on this site in the local area (Pavel?) that might be able to help me.
Can anyone give me a hand or at least let me know where to look next?
Thanks,
Smitty
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