I have cut the cats out of my car....if I install O2 sims, will that cause my ECM to lean out my A/F?
As of now, I have no front O2 sensors, I throw a code every 3 or so months and my car is running super rich (dyno this weekend revealed that it dropped below 10/1). One reason was the plugs and the other reason may be contributed to my present O2 rear sensors have no "initial" reading of exhaust to make adjustments to my a/f.
this has been a huge misunderstanding...I took my front sensors out for a day (Installation reasons) and put them back in.....
I'M THROWING A CODE BECASUE my cats aren't out, not because my o2's are gone. I didn't elaborate on the post enough b/c I was half paying attention and just assumed that everyone knew that I wouldn't "permanently" take my 02's out.
what everyone was wondering was..how am I not throwing a code the second I start my car.
my view was...how am I not throwing a code more often than every 3 months for HAVING MY CATS OUT...
this has been a big misunderstanding.
My question was about the 02 sims which I will place in the rears so my car won't throw a code. However, I was wondering how the 02's work in that if I place them in the rear, my rear 02's won't have a "downstream" comparison and I'm wondering how that will affect my pcm's command to adjust the a/f?
gotcha. to the best of my knowledge rear o2's don't affect the pcm's altering of fuel in any way. Like someone said above they just let the pcm know if the cats are working, so the sims are supposed to take care of the sporadic code.
It does seem like the code would be more frequent.....hmmmmm, do you know what code number it is by chance?
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.