I am the original owner of a 2000 F250, manual transmission with 70K miles. Twice I have experienced a lack of power and both times, it was the same situation. I drive about 10 miles into town to get breakfast. I turn the engine off while ordering so they can hear me over the motor. I start the engine and head home. The motor idles fine, but it is like I have my trailer hooked up until the rpm hits about 1800 and then it accelerates normally. Going 60 mph in 5th gear up a modest hill, the vehicle cannot accelerate with the pedal floored. I let it sit for 15 minutes and went around the block and the power is back. ?