O2 nightmare

[1fastRS]

okay heres my problem. i put on a cat back system, with a high flow. as soon as i drove the car it threw the cel on. it's showing code 12,21,and 42 (up and down stream o2, and fuel pump circut short) this all happened as soon as drove the car after the new mods, so i'm guessing they set it off. now how the hell can i shut them off, and will it keep them off and fix the problem? i'm afraid i have a too lean or rich a/f mixture now. will this hurt my car? also on another note, i'm putting a turbo on. when i do, how do i know where i should keep my a/f mixture at? should i shoot for the stock mixture of 14.7 or what. please help me because i'm new at all this and i'm going out of my head.

 

[ltvarney]

You are OBD-II so you'll need something like this if the CEL bothers you.

http://www.importparts.com/shop/product_info.php?products_id=2770

For the tuning part, you'll want to discuss your setup in the performance forums or newbie forums. Be sure to give info on what turbo kit/components as well as what data acquisition and tuning devices you are running so the gurus can help you out. Might even be able to score some base maps to start with.

Since you are putting a turbo on an n/a I'd think you probably will want to richen it up to cool things down. If you get the Hahn or Star kit they will probably have a magic box to do it all for you.