B16a faild emmisions 02 problem
 

I just faild emmisions in Colorado today. I through a O2 code intemittenly so Im going go change the O2 sensor and try again. What sensor is sensor A on the exhaust manifold because I think it might be possible that I got the two O2's fliped during installation.

Re:B16a faild emmisions
 

sensor A is the first one, should be more wires 4 or so.
I would get a new o2 sensor though to just be safe

Re:B16a faild emmisions
 

what car is this? if its an OBD 0 and a pwo or pr3 ECU it needs 2 1 wire O2 sensors or you will run super rich, i had that problem when i did my frist set of e-tests in colorado

Re:B16a faild emmisions
 

ALSO make sure you have a GOOD cat and its not gutted.

Re:B16a faild emmisions
 

Yea im not sure what obd he is, i was thinking obd1 or 2
Yea have a good cat too

Re:B16a faild emmisions
 

sorry, Im running a pr3 ecu so its OBD0. I have a new cat but its kinda small. Im guessing O2 #1 is for cyl. 1-2 and O2 #2 is for cyl. three and four. So, do does the 2 single wire o2 set up typicaly run rich? and what can i do to fix it.

Re:B16a faild emmisions
 

if your only running one o2 then you are going to run rich, if your running 2 o2's then your hurting. i did notice that i could NOT use an USDM o2 sensor on my pr3 i had. it could have been bad but the new o2's from napa look the same as teh JDM ones. who swapped your motor out for you?

Re:B16a faild emmisions
 

I did the swap myself. So what O2s should i use and how do i fix my problem of running rich?

Re:B16a faild emmisions
 

go to napa and get a 91 crx si 1.6 o2

Re:B16a faild emmisions 02 problem
 

I went to auto zone and got 2 new bosch ones and i am running the pr3

Re:B16a faild emmisions 02 problem
 

then try it, does it smell rich? are you usin an AFC or anything?

Re:B16a faild emmisions 02 problem
 

Ill install it and i also have a cheap AF gauge ill use to see whats goin on. My car spikes rich only when i first touch the gas then in it goes stock. Im running totaly NA at the moment

Re:B16a faild emmisions 02 problem
 

Do you know what cyl O2 #1 is because its possible i could have the two o2s fliped

Re:B16a faild emmisions 02 problem
 

i belive 1 covers 1-2 and 2 covers 3-4

Re:B16a faild emmisions 02 problem
 

what's the firing order?

Re:B16a faild emmisions 02 problem
 

PASSED with flying colors, 1/4 to 1/2 of standards on NOx HC and CO. Nothing a gallon of denatured ethanol cant fix. Glad I passed but now the car is so slow from the alcohol. Thanks for all the help.

Re:B16a faild emmisions 02 problem
 

wait,.. what did u do!?

Re:B16a faild emmisions 02 problem
 

before i went to emissions, i tried taking the check engine light bulb out, i didnt know they scan the ecu and see if ur cel light comes on when u start :-\

Re:B16a faild emmisions 02 problem
 

Ethanol reduces CO levels but has no where close to the fuel value of gasoline. Here in Colorado the the state mandates 10% ethanol mix in the winter to reduce emmissions and smog. I just added another gallon to about 9 gallons of gas and passed no problem. And yes they just make sure your check engine light turns on when you put your car in the on position