I have had this issue for years and have tried to diagnose it and have never figured out what this issue was.
The truck is a 2005 ford f-250 6.0, 149k body and 20k on a new engine. Just install a new torque converter because last one failed. Truck is lifted 6 inches, and has various aftermarket...
I have a 1997 Ford F-350 7.3l and I want to know if I can take the engine out and put a early 2000 engine in it and keep it the same and just change the camshaft so the fuel lift pump can ride on it still.