On my way home one day I slowly started losing power and wasnt able to hardly keep it going past 50MPH. The couple of days beforehand I heard a " marbly" sound, and I am 99% confident the sound was coming from the catalytic converter. I took it to Midas, and they put a heat gun on it to get the temp reading before the cat and after, he said the cat is fine. I then took it to the local mechanic and he drove it, said its fuel or exhaust. After a couple of days he says it is the cat, and that I need to spend 800 bucks, and then since it was probably a tune up issue causing the cat to go bad I would have to drop another 300 on the tuneup. Needless to say I just picked it up and took it home.
I dont think its the cat, and doesnt appear that there is a fuel filter?