Stock Catatlytic Convertor Blown?
#1
Stock Catatlytic Convertor Blown?
on my driver side cat, it rattles like a metal ball in a tin can when the Car is idling (intermitently).
I can also duplicate the same problem when I just bang on the cat with the engine off.
I am writing to see if anyone has experienced this or if my Cat is really blown... Please advise before I take my car into the shop to have the CAT removed and looked at.
Thanks in advance,
P.S. I have elminated the possiblity of the CAT banging against the heat shield
I can also duplicate the same problem when I just bang on the cat with the engine off.
I am writing to see if anyone has experienced this or if my Cat is really blown... Please advise before I take my car into the shop to have the CAT removed and looked at.
Thanks in advance,
P.S. I have elminated the possiblity of the CAT banging against the heat shield
#2
Red Card Crew
iTrader: (24)
It could be that a piece of the cat broke off and is rattling around. You should take a look asap. If that piece is big, then it will continue to rattle around and eventually form into a perfect ball. When that happens, it will intermittenly plug up the exhuast outlet. So when you hit the gas, it plugs. When you get off the gas, it unplugs.
#3
#6
Originally Posted by GangSTAR35
time 4 racing kats!
Please pardon my ignorance on CATs, I just can't visiualize how can a honeycomb be causing the problems that I have now; is it some part of the honeycomb got destroy? but won't that be blown out of the CATs? (at least to the Ypipe...)
I really appreciate you guys' help tho.
Kudos!
Edit:
I will have my car looked at again on monday and very likely replace the rattling cat with my friends' stock CAT... but is wondering if it is okay to drive the car over the weekend.
#7
Red Card Crew
iTrader: (24)
Um it was me that said that, not him.
Imagine a big chunk of the honeycomb breaking off. Then it rattles around when you drive. all the sharp ends get broken off and shoots out the exhaust. Eventually it forms into a ball. I've seen examples of this in an header shop that I used to go to. Now if the chunk gets small enough, it will just pass though. But if it's big, the ball will get pushed against the outlet of the cat (ie.. a circle), when you hit the gas. (increase the exhaust flow). When you let off the gas, it creates a vacuum condition and sucks the ball off the outlet. This leads to some very odd running and is hard to diagnosis
Imagine a big chunk of the honeycomb breaking off. Then it rattles around when you drive. all the sharp ends get broken off and shoots out the exhaust. Eventually it forms into a ball. I've seen examples of this in an header shop that I used to go to. Now if the chunk gets small enough, it will just pass though. But if it's big, the ball will get pushed against the outlet of the cat (ie.. a circle), when you hit the gas. (increase the exhaust flow). When you let off the gas, it creates a vacuum condition and sucks the ball off the outlet. This leads to some very odd running and is hard to diagnosis
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#8
Originally Posted by Jeff92se
Um it was me that said that, not him.
Imagine a big chunk of the honeycomb breaking off. Then it rattles around when you drive. all the sharp ends get broken off and shoots out the exhaust. Eventually it forms into a ball. I've seen examples of this in an header shop that I used to go to. Now if the chunk gets small enough, it will just pass though. But if it's big, the ball will get pushed against the outlet of the cat (ie.. a circle), when you hit the gas. (increase the exhaust flow). When you let off the gas, it creates a vacuum condition and sucks the ball off the outlet. This leads to some very odd running and is hard to diagnosis
Imagine a big chunk of the honeycomb breaking off. Then it rattles around when you drive. all the sharp ends get broken off and shoots out the exhaust. Eventually it forms into a ball. I've seen examples of this in an header shop that I used to go to. Now if the chunk gets small enough, it will just pass though. But if it's big, the ball will get pushed against the outlet of the cat (ie.. a circle), when you hit the gas. (increase the exhaust flow). When you let off the gas, it creates a vacuum condition and sucks the ball off the outlet. This leads to some very odd running and is hard to diagnosis
Thanks again Jeff
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