MIne did somethign similiar when my cat was plugged. I used an infrared thermometer to compare the temp difference between the front and back of the cat. Mine was about 400 degrees difference. I think I remember reading that there should only be a 50 degree difference. Someone can correct em if I'm wrong. But mine wasnt throwing any codes.
I gutted it and it's ran perfect since.
__________________
94 Trans am 25th anniversary
86 Buick Regal T-type
73 camaro 454/T56 work in progress.
|