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post #1 of (permalink) Old 08-21-2000, 08:35 AM
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Cat-Converter - Always Replacing

I cannot understand it??!!?!?! I have replaced three cats on my zuk and I am getting so frustrated. I have 1.6L with a weber carb, Thorley header and 2-1/4" exhaust with a flowmaster and once again it fried out. I am probably just gonna stop using a cat (since it isn't smog legal already) - but why does this keep happening to me? Why do I keep frying these cats?

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post #2 of (permalink) Old 08-21-2000, 08:50 AM
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Re: Cat-Converter - Always Replacing

Is your fuel mixture too rich?
You could dumping raw fuel into the cat conv.
which will evenutally plug the cat.
Try leaning the mixture out a little.
If that dosen't work just hollow out one
of the old cats.

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post #3 of (permalink) Old 08-21-2000, 10:12 AM
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Re: Cat-Converter - Always Replacing

Your mixture is too rich. If you arn't sure on how to jet it then either find someone who is, or find a shop that can help. the danger with doing it yourself is if you go too lean you can damage your engine. That said go down
1 size main jet at a time and check your plugs after a high speed pass. they should be light grey in color not white,
on the webber I also think there are lowspeed jets too, and possibly a needle set. So as you see it could get involved.

Glenn Loud
87' Zuke Spoa, 31's, 4.16 tcase, Camo,Header,2"exhuast, Cam.
Locked both ends, 8klb winch, Snorkel -Wildweasel2
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post #4 of (permalink) Old 08-21-2000, 10:50 AM
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Re: Cat-Converter - Always Replacing

I have no idea about the jets or anything related to jets or how to adjust them, etc....I guess I will have to call up mechanics (oh no!!) to find out what I need to do to fix this problem....thanks for the help!

post #5 of (permalink) Old 08-21-2000, 06:31 PM
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Re: Cat-Converter - Always Replacing

Just any old mechanic isn't going to help much. Most good size towns have someone that rebuilds carburators that is who you ask mechanic about. You or the shop replacing the jets need a selction of jets and knowledge of your carb.

post #6 of (permalink) Old 09-11-2000, 10:51 PM
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Re: Cat-Converter - Always Replacing

ditch the cat they suck, plus it will sound better w/out cat

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