Engine Dies on the Highway

courtesy of Bob, The Auto Answer Man

I have a 1991 Ford Bronco with a 351W with EFI. When it's cold, it runs fine. When it's warmed up, it idles and runs fine at low speeds. Once up to highway speeds, depressing the accelerator to speed up causes it to stutter and miss. The more I press the accelerator, the more profound the stutter/miss. I replaced the oxygen sensor, that seemed to help for a day, and then not. Any suggestions?
Tom L. of Ashton, IL

Check your ignition wires. They will have more of an effect under load than at idle, especially after they have warmed up.
Good Luck!
Drive Safely!
Bob, The Auto Answer Man

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