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  1. mechjames

    misfire/backfire and loss of power

    my friends 89 bronco II 2.9L has an interesting problem. at idle to about 1200 its fine, from 1200 to 3000 it'll run rough, and stutter, and sounds like its backfiring. if u pump the gas a lot and get it above 3000 it'll take off like a bat out of hell. changed the fuel pump, pressure...

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