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Posted on Sep 29, 2009
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1997 F-350 Ford Powerstroke4x4 Crew Cab Diesel 83k miles. Truck runs fine while cold. When it starts reaching normal operating temp it starts missing and loosing power when accelerating. Truck idles fine. When pulling 5th wheel trailer it misses bad under acceleration and is very low on power. Dealership had truck for 3 1/2 weeks. No codes showed on machine. They replaced fuel pump, fuel pressure regulator, fuel filter, CPS O-rings on injectors, sending unit on rear tank and cleaned tanks, checked IDM, ECM, Throttle assembly, Map Sensor, EPBV, did compression check. No change in problem. Can you help?

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Had all these same problem - Replace oil pump truck runs great now!.
Do not forget to prime new oil pump thru hole on top!

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  • Posted on Sep 29, 2009
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Have you changed your oil? Rotella 15W-40. These engines really don't like old oil. It becomes too thick for the injection pump to work correctly. Another possibility is a bad cam sensor on the front of the motor. Most engines call this the crank sensor but on this engine you have to look it up as a cam sensor.

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