PDA

View Full Version : De-Cat - Lambda Fooler - How To.



snoop69
Tuesday 30th September 2008, 21:40
The following has not been tested by me so i accept no responsibilty for any
blown engines or failed Mot's :D

If anyone tests this method (as used by the Evo boys) please let us know.

------------------------------------------------------------------------

Some people are using spark plug anti foulers but my mate has had an
old sensor drilled out & a nut welded to it so he can move his sensor
away from the passing gasses.

Heres some pics showing how the other guys do it.

1.
http://i55.photobucket.com/albums/g126/snoop69/Car%20Stuff/1.jpg

2.
http://i55.photobucket.com/albums/g126/snoop69/Car%20Stuff/2.jpg

3.
http://i55.photobucket.com/albums/g126/snoop69/Car%20Stuff/3.jpg

4.
http://i55.photobucket.com/albums/g126/snoop69/Car%20Stuff/4.jpg

You now need to drill out 1 of the non foulers using a 1/2" drill bit. When finished this is what it will look like.
5.
http://i55.photobucket.com/albums/g126/snoop69/Car%20Stuff/5.jpg

6.
http://i55.photobucket.com/albums/g126/snoop69/Car%20Stuff/6.jpg

Side by Side comparision of the orignal and now modified non foulers
7.
http://i55.photobucket.com/albums/g126/snoop69/Car%20Stuff/7.jpg

8.
http://i55.photobucket.com/albums/g126/snoop69/Car%20Stuff/8.jpg

o2 Sensor inserted in the modified non fouler
9.
http://i55.photobucket.com/albums/g126/snoop69/Car%20Stuff/9.jpg

Second, unmodified non fouler now installed on modified non fouler
10.
Original non fouler->Modified non fouler->o2 sensor
http://i55.photobucket.com/albums/g126/snoop69/Car%20Stuff/10.jpg

11.
http://i55.photobucket.com/albums/g126/snoop69/Car%20Stuff/11.jpg

Fully installed
12.
http://i55.photobucket.com/albums/g126/snoop69/Car%20Stuff/12.jpg


The idea behind it is when you remove the cat the 2nd o2 sensor is going to have too much crap reaching the sensor that isnt filtered out, which will make it think the cat has gone bad. What this does is it moves the o2 sensor further away so a limited amount of exhaust gets to the o2 sensor, it is a VERY little amount that actually gets to the sensor but as long as it is considerably less than the primary o2 sensor then it wont cause a light.