anything to"clean" a catalytic converter? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 02-01-2007, 10:10 PM
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anything to"clean" a catalytic converter?

smog time. What can i use in the gas to help clean up the converter?

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Old 02-02-2007, 02:57 AM
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they use to have a plug to remove and run the engine for a few minutes, but now i dont know may have remove it and pressure wash it? in ohio we have no smog law we take them off, scrap em for $140 and $15 getting a pipe installed in its place,and also 5 more miles to a gallon.
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Old 02-02-2007, 05:03 AM
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do you really get $140 for a catalytic converter in ohio?
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Old 02-02-2007, 06:27 AM
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When they are getting clogged up, replace them..............
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Old 02-02-2007, 09:53 AM
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Quote:
Originally Posted by 53belair
do you really get $140 for a catalytic converter in ohio?
thats the most it all depends on the design gm converters bring the most. whenever one of my family gets a new car or truck as soon as the warranty is up , off comes the converter
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Old 02-02-2007, 10:39 AM
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converters that ARENT all used up bring alot of $, because they still have alot of platinum and such left in them

if you wait till the converter is totaly fried, your lucky to get $40
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Old 02-02-2007, 10:57 AM
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Have it gutted, run a pipe through so it doesn't sound hollow, good to go. Will pass visual inspection, but how itís running is up to you, too tune. lean it out turn down your timing slap in some hotter plug and hope for the best. get it good and hot.

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Old 02-02-2007, 01:22 PM
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Clelaning a Cat,

Regardless of the sales hype, there is nothing that will "clean" a clogged catalyst. Once the cat starts to plug up, it will also overheat the inlet face of the brick. Once that starts, the ceramic element will get hot enough to melt. Sometimes it melts enough to close off the brick completely, sometimes it just restricts it. In any case, you cannot save it. Test for clogged cat by looking to see if there are any emission control hoses connected to the exhaust system and a sensor. If the hose is blown off, you have excess back pressure in the exhaust system. A vacuum gage hooked to the intake manifold can also be used. The final word is to remove the cat and look up the pipe. Removing the cat or bashing out the brick will not help you pass the emissions test.
Things that will help are: fresh oil change, new air filter, clean PCV valve(and the PCV air filter sometimes found in the air cleaner box), and get a definite time for the test and bring it to the appointment immediately after spending about 15 minutes on a high speed freeway run.
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Old 02-02-2007, 02:22 PM
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What about buying a new one?
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Old 02-02-2007, 02:29 PM
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Quote:
Originally Posted by strummin67
What about buying a new one?
Exactly......you cannot clean one up....you need to replace it.
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Old 02-02-2007, 02:44 PM
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In some counties in Ohio, you must pass an emissions check. If your car was produced prior to 1996 and was equipped with emissions equipment, you will need to pass a tailpipe test (probe up the tailpipe that measures emissions). Later than that, they read the car's ECM to see if the emissions equipment is performing. A lighted CEL is an automatic failure, and a 'Not Ready' condition on the ECM MAY be a failure. They also check to see if they can detect any tampering. Any of the modifications suggested above would cause these cars to fail the tests. The only good thing about Ohio's E-Check is that it is free in 2007 and 2008 I believe - used to cost $20 and was good for two years. Apparently the cost is now born by all - required county or not.

For the counties not subject to E-Check in Ohio, I suppose you could do anything you want, but I would bet there are a lot of CELs turned on in these cars because the ECMs are monitoring the performance of the emissions equipment. Wished I lived in one of those counties.
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Old 02-02-2007, 03:02 PM
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It probably won't be long before the E check is required in ALL counties.
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Old 02-02-2007, 05:25 PM
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Quote:
Originally Posted by lowROLLERchevy
converters that ARENT all used up bring alot of $, because they still have alot of platinum and such left in them

if you wait till the converter is totaly fried, your lucky to get $40
i forgot to mention that i get anywhere from $15 to $140 depending on the amount of platinum.
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Old 10-30-2008, 09:02 AM
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Clean a catalytic convertor

Hi

Just to be upfront.., I'm not a hotrodder, I found this thread when I was doing some Googling.

I'm in the UK. There are 2 products here that are used to clean catalytic converters and lambda sensors. Neither of them work if your cat is so far gone that it's physically breaking up inside.., rotten eggs smell. They do work well if your emissions are running too high for the annual roadworthiness (MOT - Ministry of Transport) test.

One is called Forte, and is sold only to the trade, car-repairers... The other is called Cataclean, made here in the UK. ***********.

Andrew

Last edited by powerrodsmike; 10-30-2008 at 07:45 PM. Reason: Advertising. Please see: commercial posting guidelines.
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Old 10-31-2008, 08:26 PM
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Exhaust shops have a pressure gauge that screws into the O2 sensor hole to test back pressure. This is the correct way to test system pressure.
Replace any questionable cat with a new aftermarket cat. Magnaflow makes very good cats, some speced for 4 sensor systems.

US has Federal smog specs that supercede ALL state requirements.
Never heard of anyone who got snagged by the Fed specs ----yet.

Not sure, but it is something like $25,000 per occurance for pulling a cat off a vehicle...... for shops and individuals alike.
I do not allow my shops to remove cats from the systems.... R and R only. Now, if they don't have them on the vehicle when it comes in..... that is another story.
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