Grim Reaper

I was wondering if anyone had problems with the above setup on a 99 A4 1.8t with a full 3 inch turbo back exhaust with HFC throwing cells due to the o2 sensors being to close together and both being before the HFC...If this has been a problem with other people how did you get around the cell i.e. did you plug the one o2 sensor hole and put in another o2 sensor down past the HFC in order to get the change needed to keep the ECU happy? TIA

skabaru

move the 2nd one so it is behind the cat.

Grim Reaper

So how the hell do I plug the other o2 sensor hole? Maybe I should just install it and see if I actually even throw a cell you would think the during the fabrication that the placement of the o2 sensors would be key in development....crap

skabaru

taken from a subaru forum, found in a under 1 minute google search:
<I>
a lot of toyotas use an m18 x 1.5 drain bolt. i posted the part number in a thread somewhere, i'll find it and edit the post. i think some mitsu's use the same size also.

here we go: toyota dealership. part #90033-41020 Plug. $2.50, it's about 1" long so you wont' even have to cut it down.
</I>

from what I understand, nearly all 02 sensors are the same size and pitch, so that <I>should</i> work.

Pat

Yep, I did just that a few days ago. MTM revised their stage III to put the last sensor post-cat.

Grim Reaper

I mean what type of medium do you stick in the existing o2 hole? Rubber Plug or what?

Pat

I just got a new DP, flex joint and cat. It's just that easy. No patching. Sorry I couldn't help.