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 Post subject: Re: Is there some way to clean a Catalytic Converter?
PostPosted: Fri Feb 05, 2010 8:07 pm 
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Joined: Tue Aug 04, 2009 7:27 pm
Posts: 293
Location: medicine hat,alberta,canada
my 91 turbo boosted alot quicker with no ex pipe at all, more than my 2.5'' mandrel bent exhaust,WAY QUICKER when i removed both cats,police dont like fully open turbos(why not?)open exhaust still not as noisy as a silly "harley"bike riders-or cherry bombs

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1.0 turbo
2"exhaust,no cats/resonator
3 tech 6*gear
3 tech turbo grind cam
3 tech cylinder head/w/port,polish,blend,oversized s/s valves
gti brake swap
more to come...


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 Post subject: Re: Is there some way to clean a Catalytic Converter?
PostPosted: Wed Feb 24, 2010 11:53 pm 
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Joined: Tue Aug 01, 2006 8:52 pm
Posts: 334
Location: Birmingham, Alabama
You guys do realize this thread is almost 5 years old, right? :roll:

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 Post subject: Re: Is there some way to clean a Catalytic Converter?
PostPosted: Wed Sep 01, 2010 7:32 pm 
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Joined: Thu Feb 04, 2010 10:31 pm
Posts: 2
Location: bakersfield, ca
Just run a can of "Catalytic converter Cleaner and Deodorizer" through the carburetor, or vacuum line. I put a can in the gas tank, along with a can of "Guaranteed to Pass", and ran the tank until almost empty, then ran another can of "Catalytic converter Cleaner and Deodorizer" through the vacuum line, as I had to do in my 1998 Taurus. It failed smog, but after the treatment it passed with flying colors.

Before HC @ 15 mph allowed 52 ppm measured 42ppm (pass) after treatment 20 ppm @ 25mph allowed 36 ppm measured 52 ppm (fail) after treatment 18 ppm (pass).

Other ones also dropped like CO% .35 @15 mph to .04 and .32 @ 25 mph to .25

and the NO from 13 ppm @15 mph to 0 ppm and 12 ppm @ 25 mph to 7 ppm

Do make sure that you have plenty of ventilation when you run the can through the intake, as a extreme spell and pollutants will emit from the exhaust. i did not notice any visible smoke, but the smell was terrible, and most likely toxic. Also be sure to fill the tank up to dilute any left over chemicals, and run it down the highway a little to clean it all out, before trying to smog it again. This stuff will also clean the injectors.


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