Archived problem with my VP44???

[CTomasino]

Tampering with VP44 fuel pump on Cummins diesel engine.

This bulletin supersedes technical service bulletin 14-002-02, dated July 1, 2002. A number of the VP44 fuel pumps have been returned through the warranty process as a result of tampering. Generally, the customer complains that the vehicle dies while driving. When diagnosed, there may or may not be Diagnostic Trouble Codes (DTC) present. When DTCs are present, there may be one or more of the following:

DTC P Code Description

124 P 0234 Turbo boost limit exceeded.

146 P 0217 Decreased engine performance due to engine overheat condition.

361 P 0254 Fuel injection pump fuel valve current too high.

363 P 0251 Fuel injection pump mechanical failure fuel valve feedback circuit.

364 P 1689 No communication between ECM and injector pump module.

375 P 0602 ECM fuel calibration error.



The diagrams show the area where performance enhancing equipment is being connected into the outboard wire of the two wires that control operation of the metering solenoid in the pump. Another type of device places a connector between the metering solenoid harness and the upper connector on the pump. Telltale evidence can be seizure of the pump rotor, and/or cracked or overstressed pump cam ring. The protective sleeve around the two wires may be rolled or cut back to gain access for connection. Injection pumps that have been tampered with are not warrantable.

 

[CTomasino]

I am having a problem with my truck, I can feel the power surging up and down as I raised the power level on my TST box it gets worse at 0 or off I couldn't tell if it was doing it but at level 9 on the highway it would feel like it wasn't getting enough fuel. Now in the last two days the truck died twice while I was driving just, shut down like I turned it off. I just came across this bulletin and was wondering if anyone had this problem? I don't want to by an injection pump if I dont have to. All so the filters on the fass have been changed, psi never goes below 14-15 psi and the tap at the pump wire is good. PLEASE HELP!!!

 

[jwinnie]

Is your check engine light on?

Have you checked for codes? If so, what are they?

Tried turning off the Pmax?

With your symptoms, I would look real close at the TPPS.



Good luck,



John

 

[CTomasino]

The check engine light has gone on and off, codes came up (p0253) I erased it. Then the first time it died codes 0500,1698,0254,and 0237came up erased thoughts and this last time it died no light and no codes. What is the TPPS? I talked with one of the guys at MASS DIESEL and he said it sound like the injection pump from what I told him. So unless someone knows a quick fix to my problem I am off to mass. to get a hot rod VP.

 

[jwinnie]

Sorry, I meant APPS, (Accelerator Pedal Position Sensor) A friend with a 2001. 5 had a similar problem, truck stalling/surging. turned out to be the APPS. I don't think he had all those codes though. I'll try and get him to post.



John



Edit: Just remember, Any input to; or problem with the APPS is amplified by a fueling box.

 

[2-ND TIME]

APPS how many have bad APPS and don't know it ???

My 99 dog crap has had a bad apps since new and they have missed this fact completely Check cummins bulliten No. 3666480 for this. check out the on and off-idle change of states I suspect that this is a bigger problem then most think for I have measured out of the box and they are all out of spec. form 2k5++ to 3. 65 Meg ohms far above tne secified < 125 ohms. so until I find on that meets spec,s I am not wasting any more money!!!!!!! :-{} gutless wonder has the power just like my 86 Toyota pickup.