All of sudden yesterday the car would not accelerate over 3000 rpm's. Just starts bogging out. Also noticed the last few times the car was driven that the cat converter was making more rattle noises than it used to. I checked resistance of flywheel sensors and they test out ok. Replaced both fuel pumps last summer and they seem to work ok. Filled up the tank to make sure it was not a fuel pick up problem in the tank. Would a bad cat cause this problem and what else should I be chasing? Thanks