tap on the side of the cat for rattling, if its not gutted, it may be going bad, and your o2 sensors may be going bad, and if the cats gutted, it may throw a cel for the rear o2 sensor, as it will be getting a dirty reading
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'95 RAM 1500 318, AUTO, 14X3, HUGHES PLENUM FIX, NO CAT, GLASSPACK, 2" LIFT, OVERLOADS, CB, DUAL WHIPS, HERCULINED ROCKERS, MORE TO COME 
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