E250 Intermittent Rough Running, Help Pls
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E250 Intermittent Rough Running, Help Pls
Am experiencing intermittent rough running on my '89 Ford Econoline E250, 302 V8. Complete tune-up done (points, plugs, rotor, cap, wires, air filter, fuel filter, and crank-case filter) with no effect. Idle is good, but while driving at low or highway speed, performance is often poor for as much as 10 minutes then clears up. 67,000 miles. Any suggestions?
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