Stutter/Vibration & Loss of Power While Downshift on Highway - Ford Powerstroke Diesel Forum
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Old 11-20-2010, 09:22 AM
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Stutter/Vibration & Loss of Power While Downshift on Highway

Truck: 2009 F-250 FX4, Crew Cab, Long Bed, 6.4L (32,500 miles)

Last night on the freeway I was climbing a slight grade going about 70 mph. I put my foot a little more into the pedal to pass the car in front of me. The truck started to down shift but then started to stutter (like little very quick vibrations) and the motor reved up but the truck didnt really speed up. I let off the accelerator and the truck calmed down and everything was fine. No service light came on. (Truck continued to "vibrate" until I let off the pedal)

It did this twice last night on a 300 mile drive, and it did it a few weeks ago on a long drive. One additional note, it was raining last night while I was driving, and I BELIEVE it may have been raining a couple of weeks ago when it last did this same thing. That being said, I do not think its a tire traction issue...I made sure my tires were all on pavement (not on road striping) when it did it the second time last night.

Any ideas?
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Old 11-20-2010, 03:48 PM
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My '09 did that a few months ago. The dealership replaced the #7 injector. They said it had water in it. I had changed both fuel filters less than a week before it happened.
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Old 11-21-2010, 09:57 AM
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how weird...guess it needs to go to Ford
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Old 11-21-2010, 11:03 AM
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When it happened to me, there was no check engine light, but the dealership was still able to find a code. I can't remember what the code was, though.
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Old 11-22-2010, 11:40 AM
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I dropped it off at the dealer this morning...Hopefully I'll hear something back today.
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