FORD E350 losses power after 2 hours of driving. Speed will drop down to 20-25 and won't shift any longer. But if I put on neutral and press on the gas, the engine will rev up
No year posted is there a check engine light on and a wrench sign on the instrument panel? If so is this a drive by wire throttle body with a motor (electronic motor for gas pedal instead of manual throttle lever with a cable if so the motor went and your in fail safe/ limp mode go to autozone and have codes read for free then you'll know for sure what the problem is
Sounds like it goes into "limp mode" sometimes this happens to keep from damaging transmission. Transmission may be over heating or low on transmission fluid.
Answers & Comments
No year posted is there a check engine light on and a wrench sign on the instrument panel? If so is this a drive by wire throttle body with a motor (electronic motor for gas pedal instead of manual throttle lever with a cable if so the motor went and your in fail safe/ limp mode go to autozone and have codes read for free then you'll know for sure what the problem is
Sounds like it goes into "limp mode" sometimes this happens to keep from damaging transmission. Transmission may be over heating or low on transmission fluid.