How-To: Trick Comp From no cat

dawm · Post by **dawm** » Mon Apr 10, 2006 5:31 pm

i got code 172 but it went away. im not removing the sensor im just using this mod to pull it out of the exhaust a bit so it reads differently since i have no cat.

sllywhtboy · Post by **sllywhtboy** » Mon Apr 10, 2006 11:01 pm

dawm wrote:i got code 172 but it went away. im not removing the sensor im just using this mod to pull it out of the exhaust a bit so it reads differently since i have no cat.

0172 will come back until you get your AFC installed, but that comes from the upstream sensor, not the downstream.

dawm · Post by **dawm** » Wed May 10, 2006 12:23 pm

http://cgi.ebay.com/ebaymotors/O2-Senso ... 0098QQrdZ1

looks like someone has capitalized on this mod =p $14 shipped for what you can buy at autozone for $3

gilly02le · Post by **gilly02le** » Thu Apr 05, 2007 6:37 pm

Hey i was just thinking.. i just used two non-foulers like everyone else.. and no cel yet.. ill let you know how long that lasts..But, what if you were to go and get maybe one or two more, and add them to the 2 non-foulers allready there.. im thinking if it got that much farther out of the exhaust stream, it might be able to keep the ecu fooled..

Any thoughts? i think if my code comes back, im just going to go and get two more.. and add them to the works.. see if i can't solve the problem.

dawm · Post by **dawm** » Mon Sep 17, 2007 4:01 pm

just wanted to chime in/bump this.. been using this for almost 2 years and have never seen a CEL for the O2 sensor

kc2005ptgt · Post by **kc2005ptgt** » Mon Sep 17, 2007 4:20 pm

I also want to chime in - I am using two non-fouler plugs, and get no downstream o2 cel...

Been like that for only 1 month, but as much as I drive, that is good... 2000 miles on it thus far

evilneon02 · Post by **evilneon02** » Mon Sep 17, 2007 4:55 pm

ok i have a question kinda new to mufflers what does this mod for im not understanding

aperson · Post by **aperson** » Mon Sep 17, 2007 11:40 pm

If you're not running a catalytic converter, this moves the downstream O2 sensor out of the exhaust stream so that it reads less exhaust/emissions so that the car won't throw a check engine light.

evilneon02 · Post by **evilneon02** » Tue Sep 18, 2007 6:53 am

ok kool so i can remove the catalytic. and have no problems do you gain any horse power. and is this illegal?

BlackRoseRacing · Post by **BlackRoseRacing** » Wed Sep 19, 2007 7:15 pm

and is this illegal?

yes

evilneon02 · Post by **evilneon02** » Wed Sep 19, 2007 8:39 pm

will the car sound louder

kevo · Post by **kevo** » Wed Sep 19, 2007 10:58 pm

evilneon02 wrote:will the car sound louder

yes

evilneon02 · Post by **evilneon02** » Thu Sep 20, 2007 6:42 am

do i need a turbo or some kinda horse power for this mod or can i do it to a factory motor with cai and soon and exhaust

aperson · Post by **aperson** » Fri Sep 21, 2007 12:56 am

If you're doing a full system I believe.

yellowpatrol · Post by **yellowpatrol** » Sat Oct 06, 2007 4:35 pm

kc2002acr wrote:I also want to chime in - I am using two non-fouler plugs, and get no downstream o2 cel... Been like that for only 1 month, but as much as I drive, that is good... 2000 miles on it thus far

When you say two, do you mean like they are stuck together and the sensor is twice as far away from the stream as with just one spark plug non fouler?

dawm · Post by **dawm** » Sat Oct 06, 2007 8:57 pm

yellowpatrol wrote:
kc2002acr wrote:I also want to chime in - I am using two non-fouler plugs, and get no downstream o2 cel... Been like that for only 1 month, but as much as I drive, that is good... 2000 miles on it thus far
When you say two, do you mean like they are stuck together and the sensor is twice as far away from the stream as with just one spark plug non fouler?

thats how it sounds.

yellowpatrol · Post by **yellowpatrol** » Sat Oct 06, 2007 8:59 pm

Yeah that was why I asked- I wasn't sure.

Post by **Diablo0** » Sun Oct 07, 2007 10:17 am

Like to add as well... did this one the White car and it's been 2-3 months now with no code.

I'm only using one fowler with no codes.

BlackRoseRacing · Post by **BlackRoseRacing** » Sun Oct 07, 2007 11:05 am

I'm only using one fowler with no codes

Same here, several months now with a hollowed out cat and no codes for months and my inspection is due this month!

Skidman · Post by **Skidman** » Sat Dec 01, 2007 12:16 pm

when u hollow out the cat do u get the palladium and silver that's inside of it? Lol @ me not knowing what hollowing it out entails.

BlackRoseRacing · Post by **BlackRoseRacing** » Sun Dec 02, 2007 7:50 am

The cat has a honeycomb looking core inside of it that is made of precious metals....

Post by **occasional demons** » Mon Dec 03, 2007 3:23 pm

Skidman wrote:when u hollow out the cat do u get the palladium and silver that's inside of it? Lol @ me not knowing what hollowing it out entails.

Basically taking a pipe/rod and pummeling the crap out of that pretty honeycomb pictuered above, till all the King's men and all the King's horses can't put it together again, thus it falls out in little pieces. Leaving a "hollow" case. Sorry for the graphic details.

kicknaoffroad · Post by **kicknaoffroad** » Thu Dec 06, 2007 10:16 pm

just adding my 2 cents on this, maybe it'll help. but i am also cel free using 2 non-foulers. its been about 4000 miles (mostly freeway)

cbjones26 · Post by **cbjones26** » Thu Mar 27, 2008 11:27 am

quick q! i gutted my converter and i have a cel on for that if i do this mod will it take care of that code?

Post by **Diablo0** » Thu Mar 27, 2008 11:50 am

Yes, it should...

cbjones26 · Post by **cbjones26** » Thu Mar 27, 2008 12:01 pm

ok ty, i live in ny so the inspection laws here suck ass! and i dont really wanna buy a new cat bc i like the power i gained from gutting it, one more Q i both my 02 sensors are before the cat, this shouldn't make a diff being the cat is gutted right? upstream is in the header downstream is in the down pipe before the cat!

hybrid-Srt2001 · Post by **hybrid-Srt2001** » Sun Mar 30, 2008 6:52 pm

I also used thid mod after installing my afx lth. i threaded two 18mm non foulers together, and drilled out the center to 1/2" then welded it into the collecter on the header. Its been sever thousand miles, and no codes yet. the non foulers also work well for as weld in bungs for your wideband.

cbjones26 · Post by **cbjones26** » Sun May 04, 2008 8:45 am

well i did this last week i have put over 800 miles on my car an no cel!! ya. granted i had a cel on b4 i did this bc i punched the cat converter- it was plugged, both my o2 are in front of the cat( i dont really know why) while cat was plugged id get 18-19 mpg after punching the cat 25-28 mpg after this mod 30-34 mpg( i didnt know this helped with mpg)? ( granted that is when my gf drives the car i still get about 26-28 mpg when i drive!) i have a lead foot....

spoke to soon 5/5/08
cel is back on ! guess ill just buy a flowmaster direct fit cat.

alaskaneon · Post by **alaskaneon** » Mon May 12, 2008 3:17 pm

might want to try doubling up the fowlers first.

I stacked two of them behind my high flow cat when I installed my mpx long tube and it works great, 0140 code went away right after I extended the wiring on my 2nd o2 and screwed it into place. It works.

KrackstaR · Post by **KrackstaR** » Mon May 12, 2008 3:48 pm

i have been always confused about this mod can someone show a pic of what the installed product looks like?