2003 popping/backfire sounds under heavy acceleration

[Cummins12v]

I made a trip from Houston to California hauling 16k.. 10 miles from my destination. My truck started popping really bad around 1800+ rpms

 

[zfaylor]

rail pop more than likely. Able to monitor rail pressure?

 

[Cummins12v]

rail pop more than likely. Able to monitor rail pressure?

No I don’t have anyway to check it out here?. Any idea what could cause this? Could it be a bad relief valve? Or bad cp3 ?

 

[SPEEDSHIFT]

Could be lift pump, fuel filter, CP3, or the rail relief valve. Easiest thing to check first is the lift pump. Either way, it is something causing a drop in rail pressure. I will say, it is very seldom a bad CP3.

 

[ramthiscummins]

I made a trip from Houston to California hauling 16k.. 10 miles from my destination. My truck started popping really bad around 1800+ rpms

Any tunes on the truck?

 

[Cummins12v]

Has banks 6 gun

 

[RandomHero]

Where are you currently? Maybe a local member could be of some help?

 

[Tobin]

Has banks 6 gun

Is it easy to take off? I would remove that first.

 

[Red Sleeper]

Is it easy to take off? I would remove that first.

Not difficult at all to unplug the modules and leave wiring all in place. We've removed the entire harness on dads truck a few times to diagnose different issues. That is a more difficult process.