My caddy is having issues when you start it its ok untill it warms up then idles rough, stalls and the cat is glowing? I checked the codes and its saying map sensor. I replaced the the map sensor the idle control valve, tps sensor, catalytic converter and have no clue what it could be any ideas of the problem would be appreciated. Thanks !!
It could also be that his ignition coil doesn't work which dump raw fuel into the CAT. The cat then would burn any raw fuel. Shouldn't replace the CAT like Ranger says until the issue is resolve. CAT was the effect not the cause
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