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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

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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


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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.



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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.

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