Andial951

Well at least my car is. It failed smog today.

15MPH
HC Measured = 196, Allowable = 118
NO Measured = 2031, Allowable = 799

25MPH
NO Measured = 1500, Allowable = 738

I did a search of a few threads and it looks like I should check the following:

1. O2 Sensor
2. Plugs
3. A/F mixture

Anything else?

DMB14

Was your car thoroughly warmed up when it was tested? After I failed emissions I was told the car should be driven for about 40 minutes prior to getting it tested and that while waiting in line you should keep the car warm by turning it on and revving it to 2500 occasionally.

It's worth a try.

billthe3

Aren't you running a straight pipe? Did you get new chips for the bigger turbo?

Hopefully my wiring on the o2 sensor isn't messed up. I'd offer to lend you mine, but it is covered in header wrap.

inactiveuser92616

dare I say that you have a missing catalytic converter?

Andial951

I had been driving the car for about 3 hours before the test.

Andial951

Woops.....failed to mention this was on the NA.

greenshoes3

i heard that you could buy something to put in your fuel that causes even the worst of cars to pass with flying colors. do that?

Keithr726

My NA didn't pass because of the O2 sensor.

Andial951

Yes I have heard this too.....and saw it on another thread. I just might give that a try.

MyBlackCar

Fill up with 91 and and add some Techron. Run it to half tank and then get the test. That helped my old Celica to barely pass smog a couple of years ago after failing the first time. Barely.

FRporscheman

High NO sounds like a O2 sensor to me. Psh, it's ALWAYS a bad O2 sensor on these cars.

If you want to do it the cheap way, just disconnect one injector and have them do the smog test while you're running on 3 cylinders. It will reduce all your emissions by 25%! But that won't work for you, your smog is waaaaaay messed up.

marky522

Its running lean, combustion temps are higher than normal, thats what causes NO, and i dont believe that our cats are 3 way???? I could be wrong but i believe they are only two way, so they wouldnt help with NO anyway.

Mark

KuHL 951

15-20 Xylene is your best friend but you have some other issues. Just cleaning or changing the plugs makes a huge difference. Is the car completely stock?

billthe3

Can you borrow the o2 sensor from the turbo to see if that makes a noticable difference in how it runs? Then you would know that is the issue.

RMills944

That method worked for me a couple years back - and I was 25X the limit on CO! It at least bought me time to afford to fix it then!