Hello, I have an 03 that started with intermittently picking up a very loud diesel sound, rough idle, loss of power and stalling. When this happens the engine light comes on. Took it to a shop and they replaced one cam sensor but that did not fix the issue. The error code now says low fuel rail pressure. I have replaced fuel filter and checked for water. I am at a loss for what to look at next.

Thanks

 

Possibly lift pump, relief valve in rail, or failing FCA. Just some suggestions.

 

start with the lift pump

 

follow the return off of the pressure relief valve. about 1/2 way to the injector pump the line turns to rubber hose. clamp this hose off with vice grips or surgical clamps. if the problem is fixed it is probably the valve.

 

Sorry but no such code exists, low fuel rail pressure?? P0192 Fuel Pressure Sensor Voltage Too Low. Possibly

 

What is a failing FCA!!!!!!!

 

03 ram 3500 ho SRW 85,000 I have the same problem but with different codes P0088 P0700 Ineed help too.

 

I just started the truck to move it and it was missing pretty bad. It ran fine yesterday on the way back from Wisconsin. I used my point and shoot thermometer and checked the temps on the exh manifold. The front cyl was 130 and the rest were 170-180 at idle. It seems when the rpms come up the miss is better?? but after it goes back to idle it just get worse. BTW I put it all back to stock and its the same. HELP!! I am thinking injector?? Maybe?? I have 70k so I am still under warranty, but if its not rolling I'm not making money. Plus

 

Haulin please let us know what the problem was if you have gotten it fixed already mine started the same thing today

 

well got mine fixed today it was the rail pressure sensor779.00$ from dealer so i ordered from carrier truck centre international truck dealer for 194.00$ the part number if anyone is interested is 3949988 i called two different carrier dealers and both very different prices 280-194$ good luck with yours