Help please...O2 sensor question Options

[celi_gt_racer]

i'm workin on a 94' st celica atm, and it has 2 02 sensors, one in the header and one later in the flex pipe. We're putting on an aftermarket E-bay header and flex pipe, and the header itself has a spot for the first O2 sensor, but there is no hole for the secondary O2 sensor in the flex pipe. What am I to do? will the car run correctly w/ just the primary O2 sensor connected.....is there any kind of trick to get this set-up running correctly. any help would be apprechiated, we're tryin to get this car on the road at the moment

[Bitter]

get a 2nd bung welded then google the "spark plug non-fouler trick" and you'll be all set with no check engine light when you connect and install that sensor.

[6G96GT]

get a 2nd bung welded then google the "spark plug non-fouler trick" and you'll be all set with no check engine light when you connect and install that sensor.

I already have both O2 sensors plugged into the header at the same location (I know, sounds stupid). So all I have to do is get this spark-plug non fouler set up to work and that's it? Just out of curiosity...what if the check engine light is still on?

...Alright, I googled it and read a rather long post about it and it seems to me that there could be some risks (correct me if I am wrong) with this set up. What exactly are those risks? Would canceling out the second O2 sensor via the mod, potentially cause running either leaner or richer? The thread starter, 'Aaron', mentioned detonation too and that kind of scares me a bit.

This post has been edited by 6G96GT: Oct 18, 2009 - 10:15 AM