Hey guys, i have a 96 ws6 6 spd i just bought. It had an ses light on when i bought it, i have a tech 2 flash and it said my o2s were no good. I bought sims, put them in, and no more codes. The problem is in my state i need to get emmissons done before i get plates, i have driven the car 70 miles to do a drive cycle, I can check all the moniters with the tech 2, and it says all the moniters are set, but the o2, and the cat are INC. The car cant be tested, do to the moniters not being set. The car like i said has no ses light, and no codes what so ever, the kid i bought the car from said the cats were punched out, and i dont want to buy new cats, and new 02s when im planning ondoing long tubes and no cats anyway. What the hell is going on? Am i not doing the drive cycle right? Im goin on the highway at about 55-60, do you think i dont have enough miles on it? I cant get plates with out this, what can i do!!!!!

 

you need 2 sets of sims. one for upstream, and one set for downstream.

the ox sensors both will detect oxygen in the exhaust, but the downstream monitors the cat. the first sould be between 200 and 800mv, constantly switching between the two....and the downstream sims should show a constant motion of up and downs too, but should range between 430 and 470mv.

you need an upstream and a downstream set of sims.....or you need to put in sensors upstream and sims downstream.

 

Sims are for post cat O2s, not pre-cat.

 

exactly, i have my pre cat o2s in, and they are fine, no ses light..

 

Or you could screw the old after cat O2's back in and get them tuned out. That way if they do a visual of the underside of your car, you won't be missing anything.

 

wow....just wow

no but seriously, am i missing something here?

 

I guess it depends on what you mean...

 

well you need the upstreams to control fuel dont you? unless maybe you were running an open loop only tune

 

Correct.

 

guys, what are you talking about! You can only get sims in the rear o2s, thats what i have, i dont have a check engine (ses) light, i just need to know if it will set the drive cycle moniters so they can scan the car...

 

Your allowed 2 or 3 not ready's when you test BTW. Same thing with programing out, you are creating not readys without setting SES by turning off the diagnostic end of your comp(for whatever it is you switch off). Your only allowed to have so many not readys when you go into test. (this is according vehicle year as far as the # allowed)

This is what i have gathered after researching a little, because of my plans with OBD2. I went in, and my o2 heaters were not ready to test. Passed no problems

The only reason I see you not passing is that the Post cat o2's are vital to giving 90% of the emissions info, so that might be a required thing that must be ready to test. I say give it a shot and go in, and see what happens. You have punched out cats that look good. All they can tell you is, it is not ready to test and then you fix your sensor issue and come back.