My 1998 Dodge RAM 2500 Truck just stopped dead in the street and won't even try and start. IT has a 5.9 L inline 6 cylinder, 24 valve Cummins diesel engine. I hooked up an OBD II and got the following error codes listed below. The forum here has testing procedures but the first requires the engine be running (it won't start) and the other require a DRBIII scan tool (expensive). I'm just trying to get this running again without major expense. Any suggestions on where to start without the DRBIII? I can check wiring as indicated. Do the combined codes point to a specific item that needs replacing (the fuel injection pump?) with certainty? One thing I looked as said erasing the codes with the OBDII may allow it to start and run. I'm hesitant to do this since it appears some onter information may need to be read by the DRBIII if I have to take this to a shop. Any thoughts or recommendations??P0121 - Accelerator Position Sensor Volts Do Not Agree With Idle Validation Signal P0234 - Turbo Boost Limit Exceeded. Problem detected in turbocharger wastegate. P0253 - Fuel Injection Pump Fuel Valve Open Circuit. Problem sensed with fuel circuit internal to fuel injection pump. P1688 - Internal Fuel Injection Pump Controller Failure. Internal problem within the fuel injection pump. Low power, engine derated, or engine stops.P1689 - No Communication Between ECM and Injection Pump Module. Data link circuit failure between ECM and fuel injection pump. Low power, engine derated, or engine stops.Thanks! JimRAM

how much does the lift pump need to push my sons is pushing 13-15 while its pumping on both sides of the filter and at the injection pump

Most of the trucks here are running 18 to 20 psi while cruising and 15 to 16 psi at WOT. Depending on what type of LP you have, it would be wise to adjust it upwards. The check valve in the VP opens up at 14.5 psi. This helps the pump to stay cool. When you are running pressures below that, you are slowly killing the pump.

  airborne66 said:

can anyone tyell me where the part number for the 00 cummins injector pump is located Thanks.

I would think it would be on the pump somewhere, not sure where though. Never had any cause to need it.

  dripley said:

I would think it would be on the pump somewhere, not sure where though. Never had any cause to need it.

when I go back with the bolts don't I need to put something on the threads of the bolts that hold down the horn and the throttle bracket also the injector lines and if so what is best ??? thx

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how do I turn up my lp its in tank and id love to know its pushing 13-15 at filter and banjo bolt at inj pump

I dont use anything on mine and they are always tight when I take them loose again. You could use loctite on them, but I have not found it to be necessary. As far as the in tank pump, you cant turn it up but you can throw it away. The best option is to replace it with something more reliable and if you dont have a FP gauge, get one. The sooner the better.

I have never put anything on the fasteners and have had zero problems