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Shawn B
Guest
I have a performance problem that I am having difficulties diagnosing. After driving for a distance of approximately 30 miles the truck begins to buck fairly violently only to run normally after a cool down period. This has happened with several tanks of gas all non-ethanol. I have replaced the coil and checked the plugs and wires. I am considering replacing the fuel pump or the distributor but wanted to see if anyone had experienced a similar issue or had any suggestions before I started blindly replacing parts. Thank you in advance for any help.