pip

Yes thats duct tape on the wire and yes thats so much build up i cn pick it off in flakes. You guys think that maybe this ahd something to do with emissions problems?

SDrotary

hey my name is pip, don't see that to often

Psychoblue23

minus the duct tape mine looked pretty similar. Had never been changed.

- James

pip

Yeah thats my guess is that its 75k miles old, whats the average life of an o2 sensor? I think i remmeber reading somewhere 50k miles?

rotary>piston

I don't think the O2 sensor has anything to do with it. Mine had 150k miles on it when I passed with flying colors.
Is your new BOV plumbed back into the intake? If not you run extremely rich when you let off, and that might be it. You also have no air pump, which can be part of it.

pip

Yeah I know its going to be tough to pass without an air pump but i also know that its possible, Im just hoping i wont have to invest in an safc quite yet to tune it back a little. As far as the bov being plumbed back into the intake what exactly do you mean by that?

NZConvertible

The O2 sensor is only used during light-load cruise to improve economy. Unless the emissions test involves a dyno run, it won't have any effect on the results.

It's worth replacing though, as I doubt your one is working at all. I'm running without one at the moment (waiting for a sensor boss to arrive to go on my new DP) and my fuel consumption has increased a bit.

pip

Thats exactly what the emissions test is in this area. Its like a 10 min dyno run, they let it idle for a bit then take it up to 60mph and let it cruise for 60 seconds or something like that.

Digi7ech

iTrader: (1)

Arg. Emissions blows. That's what they do in AZ.

I gott a go for the first time in September. I'm hoping nothing is bad.
You guys think I'd pass with the CS Single?

rotary>piston

under full throttle the O2 sensor does nothing.
The stock BOV (or Air bypass valve ) blows back into the intake. The stock ECU is programmed to compensate for this, so it adds a bunch of fuel when you let off. If you vent to the atmosphere (like many aftermarket BOV's do) then the fuel still gets added, but the air isn't there for it to burn in.
I think if you can set it up temporarily so the BOV vents to the intake (after the AFM like the stock one does) then you may be able to pass.

pip

Hmm very interesting idea, i think i should head over to home depot and see what i can find in the way of vacuum lines and whatever i can find to fit in the hole on the bov.

NZConvertible

In that case it would definitely pay to replace it. While cruising, the O2 sensor lets the ECU maintain stiochiometric mixtures, which results in fewer emissions as well as lower fuel consumption.

j9fd3s

iTrader: (3)

also look at your air control valve, that is a key emissions part

mike

pip

thx for the help guys i have my work cut out for me tomorrow

HAILERS

http://www.dot.wisconsin.gov/drivers....htm#Procedure

turbocajun

Run your gas tank low and dose her up with some ethanol from Home Depot. She will pass with flying colors, mine did in Illinois anyway.

Steel

i always read how ethanol will make ya pass in a good way, but exactly how much do you use? I.e. do you mix it in with your gas, or do you wait until its damn near empty and run it straight?

pip

yeah anyone got any specifics on using ethanol?