ck eng light v10 e350 superduty comes on
back home now ,put 4000mi on the engine this summer and reset the light many times,the rv runs great up to 10mpg..stoped at auto zone and they said the code was P0191 and it could be fuel pump,,fu...
Forum Discussion
What year is this rig and how many miles? Yes, it appears appears to be fuel pressure related and all of those things you mentioned could cause it but you could also have wiring issues such as corroded connections or bad grounds. It needs to be gone through one step at a time. If you have a fuel pressure gauge and tools AND patience you may be able to find the problem, if not then do as track rig says and research who is good in your area. No hacks. Right now I would go under it and start following the wiring to the fuel tank. Look for grounding points at the frame. Look for connectors in the harness. If you can't figure out how to open that connectors lock clips, dont hack it. You dont want to create future corrosion points because of damaged weather pack connectors.
