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35thAnniZ28
06-13-2007, 10:18 PM
would they help me stop RUNNING FUCKING RICH!
35thAnniZ28
06-13-2007, 10:19 PM
oh yeha...i have header but no rear sensors
..just front ones
2001NBMZ28
06-14-2007, 12:20 PM
You can't use 02 sims for the front sensors.
Rikki_SeVeN
06-14-2007, 01:06 PM
I would like to hear the proper answer too... I have the rear ones...but they are dead...and I have no cat... so... it'd be cool to know if the Sims would trully help
GUSHER
06-15-2007, 12:31 PM
No They Dont Help You Only Turn Off The Check Engine Light For That Reason
Rikki_SeVeN
06-15-2007, 12:32 PM
so...it would still need proper running rear O2 sensors... to stop burnin rich?
GottaHaveLS1
06-15-2007, 02:34 PM
so...it would still need proper running rear O2 sensors... to stop burnin rich?

no, the 02 sims only tell the computer that the cats are running fine (whether they are even there or not). When u get aftermarket exhaust, there are no bungs in the y pipe for REAR 02 sensors... the sims are connected and ziptied up somewhere. You can still run rich with full exhaust, to fix it you need a tune.