Confirm my clogged cat?
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From: Orange County
Confirm my clogged cat? So I threw a code and it was for my rear 02. The car has a loss of power and sounds choked up. It's misfiring and you can smell wasted fuel. I guess the clogged cat is setting off my 02 and causing misfires/power loss?
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From: Lansing, MI via Bowling Green, KY, Dalton GA, Nashville, TN & Atlanta, GA
Every time my cat collapsed, very fine metal shavings would blow out of the exhaust. It happened to me two or three times, and my car was always undriveable.
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The cat on my 94 "slightly clogged" I guess you could say. It would idle fine but had no power below 2500 rpms and had trouble staying in overdrive. I just gutted it with a crow bar and it was fine afterwards.
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Joined: Nov 2007
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From: Lansing, MI via Bowling Green, KY, Dalton GA, Nashville, TN & Atlanta, GA
A clogged cat could cause it to run like a$$. I guess it depends on the degree of clogging, but my car was not driveable. It had absolutely no power, or throttle response, whatsoever.
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Joined: Jul 2007
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From: Spokane, WA
cats and 02 sensors can both cause a car to run like ***, but considering the code is for the rear 02 and that has nothing to do whatsoever with how the car runs, I'd say its most likely one of the cats. You could try removing the exhaust then start it up on straight headers and see if its still a problem. (note: it'll run rich, but it should be very drivable.). That could be a major pain in the *** for you though since its a dual cat car like mine. That cat up in the engine bay doesn't look fun to unbolt.
EDIT: actually I'm not so sure that's safe with manifolds/shorties. They may not be long enough to keep the cold air out of the engine. Might **** your valves, so I guess somebody more knowledgeable would have to answer that.
EDIT: actually I'm not so sure that's safe with manifolds/shorties. They may not be long enough to keep the cold air out of the engine. Might **** your valves, so I guess somebody more knowledgeable would have to answer that.
yeah my converter clogged about a year ago on me and it got to the point where i couldn't even drive it... it would just sputter and not move and idle really shitty and be really hard to start and basically just scared me to even try to start it because i didn't want to hurt it anymore than what i thought i had already.... i guess the shop i took it to said they didn't have any idea what it could have been until they took one of my o2 sensors out and put a backpressure tester in it and said i had an ungodly amount of backpressure....