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Q: what causes the Cadillac converter to glow red hot 1999 Malibu on 1999 Chevrolet Malibu

it seem like its sputtering and i had the wires and the coils changed so what do i do next??
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The fact that your engine is missfireing can cause the Cat. to glow red due to unburned fuel entering the Cat. and ignites there. That could just be as result of several other possible faults. Been in the business for 40 years and I cannot tell you what the exact solution is. Suggest you find a good shop in your area that is famiuar with diveabilty diagnostic work.
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