07-27-2016, 03:34 PM
Kent, I had the same problem with a car motor v8. It would run great setting in park, rev up fast idle just fine and then put it in gear and go no faster then 20 mph. It turned out to be the plug wires.
I would also check you fuel lines for vacuum leaks at the fittings.
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I would also check you fuel lines for vacuum leaks at the fittings.
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