I have a 2003 5.9 cummins and I've read the forums till my eyes are about to fall out, I'm stumped? My truck starts fine but has a loud high pressure sound and when I start driving it, it Boggs down at around 40mph.. I have replaced the Fca, changed out the fca connections ,tested the connections,changed the fuel pressure sensor, rail pressure valve, fuel filter? The only things I have done are change the cp3 or the cam positioning sensor.. Don't really think it's an injector cuz it doesn't smoke and starts great... ?? Can I get some suggestions?? Any1 had these codes...? Please help

 

p0088 is high fuel pressure and P0251 Injection Pump Fuel Valve Feedback What happens when you unplug your FCA? I think you have a CP3 issue But give Todd a call at T&C Diesel! Google him!

 

When I unplug the Fca I still have the high rail pressure. I tested the fittings and they get power when I first turn the key forward.. Is their a possibility the cam position sensor can be giving an issue?

 

NO Call Todd!!!

 

Who's Todd? What's his number?

 

Reread my first post! He's tops in fuel system issues! Tell him Andy CA sent you!

 

Thanks