mbox

Many of you know I've been trying to use spark plug non-foulers on my piggie's instead of relocating the 02 bungs.

The mod calls for 2 non-foulers stacked on top of each other with the top fouler drilled out and the bottom fouler left alone. B/c of a miscommunication w/ my installer, I've been driving around w/ the bottom fouler drilled out only and alas, I was getting cat efficiency codes, failing my readiness readings, seeing a semi-frequent cel and getting hesitation I could not put my finger on.

Well, I'm happy to say that I got the other foulers put on last night, reset my codes and have yet to see a cel, cat efficiency codes, my car doesn't have the slight hesitation anymore and I PASSED all my readiness blocks so emissions shouldn't be a problem now.

Please note that I've only tested these for about 30 miles so I can't say for certain that they definitely work but I will give you updates after more testing is completed.

<b>The pics are not from an S4 but you get the point.</b>

<img src="http://baper.net/~enjanir/mech_o2_sim/1.jpg">

<img src="http://baper.net/~enjanir/mech_o2_sim/2.jpg">

<img src="http://baper.net/~enjanir/mech_o2_sim/3.jpg">


<img src="http://baper.net/~enjanir/mech_o2_sim/4.jpg">

Drill out 1 of the foulers with a 1/2" drill bit. This one will go on top.

<img src="http://baper.net/~enjanir/mech_o2_sim/5.jpg">


<img src="http://baper.net/~enjanir/mech_o2_sim/6.jpg">


<img src="http://baper.net/~enjanir/mech_o2_sim/7.jpg">


<img src="http://baper.net/~enjanir/mech_o2_sim/8.jpg">


<img src="http://baper.net/~enjanir/mech_o2_sim/9.jpg">


<img src="http://baper.net/~enjanir/mech_o2_sim/10.jpg">


<img src="http://baper.net/~enjanir/mech_o2_sim/11.jpg">

The 02 sensor is out of the exhaust stream so it won't trigger the cat efficiency codes. This should also work for those running test pipes.

<img src="http://baper.net/~enjanir/mech_o2_sim/12.jpg">

2000s4biturbo::Uli

so no more CEL? thats what stops me from putting on a test pipe.

Snow Trooper

i dont like that solutio and i have my doubts about it working, but good luck

mbox

maybe I'm looking over something.

2000s4biturbo::Uli

do you have a cel?

Christian (Stage Ow)

Nice work! It'd be good to have options. I may try this when I gut mine. Any clearance issues?

mbox

For the past week I was getting them occasionally while logging or extended drives but that was when I was only using 1 instead of the recommended 2 stacked.

I was also getting cat efficiency codes and failing Readiness constantly. I would trigger these codes as soon as my car warmed up to operating temperatures.

mbox

they fit w/out issues.

Snow Trooper

and they shouldnt have anything to do wiith hesitation

mbox

Gutting the precats is a very labor intensive process and very hazordous to your health. You do not want to take a chance breathing in that dust cause you can seriously fvck yourself up permanently.

The only reason I didn't was b/c my stock dp's were fubar'd from hitting road debris so I didn't have a core to supply and my installer didn't have a welding machine so I had to think of other options for relocating the 02's. Just play it safe and get them from Vast.

<a href="http://www.vastperformance.com">Vast Performance</a>