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  1. B

    4.7 - head gasket or ????

    220,000k Exhaust red hot. After cat. Standard transmission. Won’t rev past 3000 rpm while in gear. Will in neutral and with clutch pushed in. Took exhaust off at Y-pipe and ran off manifolds- no change. No codes right now. New plugs. All plugs black. Makes me think running rich. Garage...
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