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Old 03-13-2008, 01:17 PM   #1
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Default Emissions Failure/How many Cats

Ok I looked at some other posts before making this post so to my problem I recently just had a universal high flow magnaflow cat put on and went through emissions and failed, I fear the car may be running a little rich which I may take care of but my numbers were really bad so I was wondering if maybe I need more then one cat on this car? I am not sure how many it has stock for when I got the car it had a welded straight pipe in replacement, anyways here are my emission numbers

Limit: 79
Me: 274

CO (%)

I do plan on getting the car tuned up before i re-test but should I also put on another cat or do my problems lay elsewhere?
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Old 03-13-2008, 01:21 PM   #2
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the car only came with one cat, and since its a new cat i would look somewhere else to see if that is causing the high levels.
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Old 03-13-2008, 01:28 PM   #3
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Your high HC and CO is probably due to pig richness or incomplete combustion...when'* the last time the O2 sensor was replaced? How are your plugs and wires? How'* your cylinder compression?

If you don't get that HC emission under control, it will kill the cat quickly.
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