64k on odometer it seems like its in limp mode but no lights on dash have come on .ses light was on and I checked with scanner it had p300 multiple mis fire 5 had a high miss count cleared code. replaced coil and all plugs with ac 41-103 also went ahead and cleaned the throttle body still no go . Basically I accelerate and it won't go past 10 mph or rev past 1500 ses did start flashing after I cleaned the throttle body so just parked it . How do I check if cat is plugged ?