I have an 04 6.0 F-250 . Just started doing this this morning. The truck will only slowly accelerate and has no power to pass. Has good power just off idle but falls off after about 1500rpm. Like the turbo isnt making boost. It ran perfectly fine the last time I drove it which was 3 days ago. It idles smooth...no misses...even runs great at highway speeds until you reach any grade then it starts to loose speed.
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