ivai

I just failed emissions with the following results:

25/25 test:

HC ppm: 158
CO %: 4.85 <-- FAIL
NOx ppm: 189
CO+CO2% 16.7


Similar results on the 50/15 test, with only carbon monoxide levels being too high.

Some people say that the o2 sensor can cause this... or that the cat can cause this. An o2 sensor for this car from paragon runs $160, so why not just spend 200 bucks more and get a wide-band?

Thoughts/suggestions on what could fix this problem?

Thanks,

OriginalSterm

a wideband alone won't do much for you but indicate whether you are rich or lean. you need a fuel controller of some sort to go with it.

ivai

I was thinking that replacing the o2 sensor might be helpful, if the one I have in there now is bad...

Jake951

If you are thinking about replacing the stock narrowband sensor with a wideband sensor, then forget it. The DME, which uses the O2 sensor input to control the fuel, won't work with a wideband sensor.

jwlester

I don't have the number with me here at work...sorry...but there is an O2 sensor from...I think a mustang or something...that is pretty cheap and works. Just have to wire it into the proper connector. Sorry I don't have the specifics but they are out there. Check clark's.

Josh

jwlester

Also...doesn't the dme work if you pull the sensor anyway. Reverts to a set rate or something. Seems like I heard this. I don't think you HAVE to have the o2 sensor.

Josh

testarossa_td

Search forum for O2 sensor information. Both replacement of stock(not expensive) and wideband etc...

JustinL

You can use a wideband 02 sensor if you want, though it's not gauranteed to make you pass emmissions. What you need to look for is one that can emulate a narrowband signal of 0-1V. The controller will have a couple output wires on the back: a 0-5V wire and the 0-1V that you want. substitute the 02 sensor input signal on the DME for the new wire and it should work. I don't need to pass emmissions up here so I can't gaurantee that this will work... so as usual YMMV.