Ford Repair Questions? Ask a Mechanic for Answers ASAP
My name is XXXXX XXXXX will answer your quesiton. Any Ford Dealer should be able to work on the engine managment system on your RV. Its usually a matter of them having the room to work on it (most shops dont have a large bay for RV's) Bob Bell, In Glenn Burnie, MD used to service them, not sure if they still do.
First I would pull the codes and see what code is stored and follow pinpoint tests for it. I have seen fuel pump issues and also seen a few of the rv's the lines were pinched above the fuel tank and it restricted the fuel flow and caused a lack of power. Unless there is a mechanical concern, Most likely the lack of power is either caused by intake restriction, exhaust restriction or fuel pressure being reduced.
I have learned from multiple sources that the problem my be the throttle position sensor; apparently a problem on Ford V10's. I have found a replair shop (non-Ford) that will look at the problem. I assume they have the code reader, and, yes, it should point to the problem. Are there codes / sensors that will indicate a throttle position sensor problem?