I have an 02 cummins ext cab short bed 4x4 with an auto. Truck was foggy and lost all power. Had codes P1698 P1689 P0237 which myself and mechanic buddy thought it was a bad vp44. So we replaced it with a new one from thouroughbred. Anyways he put it on and all the codes are still there and nothing has changed. I don't know what to do next!! Also have an airdog raptor and at WOT it still has 8psi

Do you have any mods to the truck? Tuner, injectors, turbo etc?

11 minutes ago, Me78569 said:

Do you have any mods to the truck? Tuner, injectors, turbo etc?

 

No, it has a 4" straight pipe and I believe it used to have an edge tuner. I bought it and found an edge owners manual in the glove box

 

Here's the troubleshooting p0237, likely a bad map sensor or 

 

Here's 1689 

 

here's 1698

 

Looking at the bus codes I think you might have a issue in the ecm itself.  I would use dielectric grease on ALL plugs under the hood.  Clean all grounds, and verify no shorts on any of the bus wires between the VP44 -> ecm -> pcm

 

Here's the wiring diagrams to find what you need.

 

 

You might want to read over this...

 

Dang @Me78569 beat me...

Edited September 5, 20177 yr by Mopar1973Man

Thanks for all the opinions! I'll let ya know what comes of it

I believe the Raptor has a pressure regulator you can turn the pressure with. It its up all the way the pump is most likely shot.