Catalytic Converter Acid Wash

Well, I saw this thread on Tundra Forum, so I started myself to make a cat soup to see if it works for my taco.

I´ll be uploading pictures tonight and tomorrow when everything is installed again on the truck.

In this link you can read requirements for selling remanufactured and new catalytic converter, and why is illegal to sell and install used ones if they are not remanufactured and certified.


It also says it is illegal changing a cat converter that is working properly.

http://www.epa.gov/compliance/enforcement/air/documents/fuelwaivers/amcced.pdf



Right now, my right cat has been 2 1/2 hour in the citric acid solution, and the solution has been getting a green color..I will let it there for six hours..

Wish me luck...

Follow up:

October 4th, 100 miles, non check engine light.
October 14th, 220 miles, non codes.
November 10th, 600 miles, non codes.
December 1st, 1050 miles, everything going right.
07/18/2014, 12800 miles later. Code p0420 again.

Final consideration: you can buy some time, in my case more than one year, if you ride more maybe it will be less, so take this data for your considerations before doing this process.

 

Here the investigation on which is base this experiment..

Reactivation of an Aged Commercial
Three-Way Catalyst by Oxalic and​

Citric Acid Washing

http://www2.ucy.ac.cy/~chpgsc/arthra/Environ.%20Sci.%20Technol.%2040%20(2006)%202030.pdf

They say a mixture of 0.1 mol citric acid, + 0.1mol Oxalic acid gives the best results. I just used the citric acid since I couldn't get the oxalic acid...

 

Some pics ...!!!

 

More Pics, here you can see the solution getting a green color!

 

Start the truck up without the headers

 

What are you trying to do?

 

I'm trying to regenerate my cat....!

 

+1

 

No way...!!!

 

Why?

 

because they cost 500 a piece

 

Don't be skairt it will be just a bit louder than normal

 

Cause I'm having p0420 code, my sensors are good, and new cats cost around 1,000...

 

Okey...

 

Take vid Tee hee

 

so whats the results, you should have those bolted back up by now!!

 

On the menu today... Boiled tacoma cats with a shot of lime colored water.

 

I let it in fresh water With detergent for the night, in order to neutralize the acid. I'll start installing it early in the morning...!

 

For the rest of us who live in North America, your exhaust system is covered for a 7 year 100k Mile warranty, no need to do this.