I have a 2004 f350 6.0 with 139,000 miles on it I have to pump the fuel pedal in order for it to start and stay running, runs rough and has a hard time goin over 20 miles per hour then takes off and runs ok whats up with this truck
Pumping the pedal does nothing for starting, that's only with a carbeurator.
Sounds like you might have a weak FICM, injector stiction, or other things.
What type of oil do you use? Oil filter? Oil change intervals? Battery CCAs? What temps is this happening in?
:welcome1: btw. All those answers will help in diagnosing what it could be.
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