Think one or both cats are shot

NickM

Registered User
Yesterday, I started to be down on power, running a little rough, and heating up more. Tries to stall when the fan comes on, I think I only have high speed-will check that.
At the same time, I have picked up a rattling sound underload from about 10 inches vacuum on up (heading to boost, not more vacuum).
Exhaust note has also changed.
I have not pulled the head pipes yet, but I was a little concerned, as I was not aware that clogged exhaust could make it heat up.
I have no coolant in oil, and no white smoke, so I am pretty much ruling out head gasket. I have not checked for balancer wobble. Do you guys think that knocking out the cats should fix my issues?

Nick
 
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