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Old 08-05-2007
b3kbruiser's Avatar
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Join Date: Nov 2006
Location: DFW Area, Tx
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If I had a clogged cat con...

Would my exhuast seem 'quiet'? Like more engine noise (belt, fan, sucking air) than exhaust?
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Old 08-05-2007
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If one of the cats if plugged it would cause a loss in power. You would have to step further on the gas to make up for the power loss and it may cause some noise in the intake like its having to suck harder due to the back pressure. You can connect a vacuum gauge to the intake to check. Its not 100% but should give you a good indication. If the vacuum drops way down when you open the throttle to a fixed position and stays low and or bounces real bad I would look further.
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Old 08-05-2007
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a melted converter would result in a airplane type sound, compressed air comming back through the intake system.

your engine would have to have been missfiring for a long time to melt a converter
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Old 08-05-2007
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Join Date: Jul 2006
Location: Hartford, CT
Posts: 62
My exes jeep had a crap converter, the combs totally broke up and clogged the cat. The thing would barely move, and when you gave it more gas, the worse it got...
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