Engine blocked cat?

blocked cat?

I think my cat is blocked on my 01 corolla because I can't hear any sound coming out of the muffler when I floor it. It used to be very loud but now all of the sound is coming from the cat/manifold area. Here are the best pictures I could get of the inside. Does anyone know if it looks bad?




http://www.cardomain.com/member_pag...090_76_full.jpg
http://www.cardomain.com/member_pag...090_77_full.jpg

i cant seem to see the picture. maybe server error right now..

Try http://www.cardomain.com/ride/667090/6

The pictures are at the bottom

Its hard to clog a cat unless you have some foreign debris flying out of your motor which is already not good. The cat could be prematurely worn out. It can only catalyze so much.

I don't think it's your cat being blocked. When I installed the Forza header I developed a huge nasty exhaust leak where the header connects to the cat. The stock gasket there fell out and literally disintegrated. I noticed the exhaust sound coming from that area right from the front of the car and not much from the muffler. I went out and bought some Permatex Form-a-gasket high temperature silicone sealant and resealed the connection. That fixed my leak and now its normal. However now I have a nasty vibration making noise when I'm at idle so I might need more sealant for cushion for the metal on metal contact.

yeah but my check engine light is on and says the cat is bad and i dont have the header installed anymore

ooo that is different. Did you get the car diagnosted to find that out?

i dont know if its clogged. i was curious so i took apart my car's cat to check, looks the same. sorry cant help you there.

Your cat looks pretty bad to me.
What did the mechanic suggest to you? change the cat?

Well for your exhaust leak, form-a-gasket works wonders.

yeah i had the car checked out because i had the p0420 code and the mechanic said my cat was bad.. i ran nitrous and blew my engine so i wouldnt be suprised if it is.. i do have an exhaust leak where the o2 sensor is on the manifold so im going to try and fix that and see what kind of a difference it makes

He said possibly a bad cat. I think it looks bad too. My car also has hardly any power like the exhaust is getting caught in the manifold.

Well I took it to Toyota today and they replaced the cat under warranty. The car runs great now. All the lost power has returned and the muffler sounds good. Definitely a huge difference.

Did they tell you what cause that?

No, I assume it had something to do with the nitrous and engine burning oil which ofcourse I didn't mention to them.

Nitrous? and burning oil? That kinda leads me to believe that you fried your piston rings. Actually, thats pretty much almost certain. How big a shot do you have? Is it nice? hehe

Yeah my piston rings were more than certainly fried. The spark plugs melted too. I have another engine now so I'm resistant to put the nitrous back on after what happened to the other engine. I'm going to take the old engine apart to see how much damage was done. It was nice while it lasted though. Nice bit of burning rubber on takeoff.

How many miles on the other motor? Is it from another corolla?

50,000 its from a prism

cat wuts that? i dunno bout u guys but mine is deleted. so its stupid loud LOL. good stuff guys. also i felt some top end and faster respond. think of it this way. 0 resistence.