A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

catalytic problem

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Old Feb 24, 2010 | 10:44 AM
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Default catalytic problem

I recently bought a 96 a4 and its a project car for me but i recently found out that they out the catalytics out of the car... the cut the pipes where it connects to the engine all the way through right b4 the canister just infront of the o2 sensors. They welded in new pipes with no catalytics. Obviously the car has the check engine light. (o2, and MAF codes). my question is what should i do about it and what damage could i be causing the car by driving it without catalytics... also what are my options as far as catalytics are concerned, price range etc...
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Old Feb 24, 2010 | 12:39 PM
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Your option is to slap a couple of universal cats back in. They aren't terribly costly but they should correct your O2 issues if the light is on for lack of converter. Click here for replacement cats.
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Old Feb 24, 2010 | 12:55 PM
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if i put on the universal cats would that solve my CEL or is that kind of hit or miss? or should i buy original cats?
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Old Feb 24, 2010 | 12:56 PM
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I have not had any complaints with universal cats causing a CEL. I have run the exact cat linked above as well as some high flow options by the same manufacturer. The 1.8t run high flow cats (much less converting power than what I linked you too) without throwing CELs.
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Old Feb 24, 2010 | 12:58 PM
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i have a 96 a4 2.8 engine which cats should i use?
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Old Feb 24, 2010 | 12:59 PM
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I sported the 2.25" on my 96 2.8l 12v. Not much to unlock power-wise so bigger is not always better.
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Old Feb 24, 2010 | 01:03 PM
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ok then u recomend i get 2 of those? how is the sound quality b/c i dont want the car to sound louder i want it to sound smooth
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Old Feb 24, 2010 | 01:08 PM
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Yes, you need 2, 1 for each bank of cylinders. I didn't notice a noise increase. Noise volume is mostly achieved through changing your muffler.
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Old Feb 24, 2010 | 01:19 PM
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awesome thanks will look into that.
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