Bad o2? Idk I think I have alot of fuel build up..

[mazdasp33d]

Okay well with mods in sig, Im running a stage 2 + sf 93 map from cobb. So I was at the mall, and when I left I started my car and let it idle. After awhile I noticed like small black beads like jumping out of my exhaust like mexican jumping beans. It wasn't alot of them but enough to leave some black stuff behind the back of my car. So I reved it, and some more came out, and when I redline I backfired out to wazoo. Any ideas?

 

[cpolly69]

use your dh or ap to run a data log and see what's going on - btw if your o2 is toast or bad you would either see funny voltage readings on the dh or not see the info. coming from it at all - you have 2 o2s a wb and a nb on the dh under the mazda parameters actual afr is from your wb - if that isn't reading it's toast - the dh also allows you to look at voltage info for both those sensors

 

[creedns]

If its your wideband pm me. I've got an extra sensor lyin around that i thought was bad but it was actually just a waste of 500 bucks!!!