Join Date: Mar 2009
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High Boost, Low Power
I bought a 2008 6.4 4x4, long bed in Sept 08. The truck has 16,600 miles on it and has rarley given trouble until now. I took it on a 3,000 mile trip. When I left, the truck was running great. On the way back, the boost was running around 25-30 psi while pulling a 7x16 enclosed trailer loaded with our hunting gear. My fuel mileage dropped to about 9mpg and the truck felt like it has a loss of power. Also, after driving at highway speeds, exiting of the interstate and starting again, the truck will not "go" when I step on the gas pedal (not in regen)! Now the boost gauge is almost always pulling 20 - 35 lbs of boost with no load.
I have had it to the dealer with no luck! The SM tells me to not worry about the boost gauge "they all do that" and also said he contacted a Ford engineer who said that "it is typical for a diesel to lose power like that". I know neither one of these are correct.
The truck is stock woth no mods, any similar problems or possible solutions?