I have a van with 140,000 miles with a 460, it runs fine when its cold, but after it gets up to temp it begins to miss severely on acceleration or when pulling. It runs good until about the time that the thermostat opens then it begins to miss and barely has any power. The engine light does not come on and we hooked up a part store scan tool and no codes were shown. Also checked fuel pressure and changed filter, plugs and wires. Any Ideas?
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Thursday, January 12th, 2006 AT 7:54 PM