the motor will start missing . almost act's like vapor lock . this model is not suppose to . it has fuel injection .efi electric fuel injection
what's the fuel pressure while it's acting up? Are all the vacuum lines intact? The vacuum reservoir intact? How's the MAP sensor? Is the exhaust extremely rusty? ie does the O2 sensor have a good ground?
Search Ford F-250 Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Ford F-250 Experts