mine did the same thing before it died. i had a bunch of crap in my fuel tank, and after having it boiled out at a radiator shop and putting in a 255lph pump it crapped out again due to the tank. . . im doing a 15gal fuel cell now.
anyways, mine has done this ever since i bought it. i did a tune up, checked timing, had no injector leaks. . . i dont know whats doing it either. i tried changing MAFs around, reset the computer, etc. im guessing when my 5.0L swap is finished it wont get any better gas mileage but it wont be slow anymore either.
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