Trac off light comes on. Car bogs down.Intermittent.

Thanks for your response. I have a actrone autoscanner but the cat over heats to much before I can get any other reading except multiple missfire.

Starting COLD , what is map/bap sensor ? (engine off-key-on should be nearly identical) map sensor should be about .8V at idle. Once in closed loop what is STFT & LTFT? Those readings may help to start. As far as the misfire , have you pulled any plugs yet , just to see what's going on in the cylinders? Visual inspection may say a LOT!