CEL for emissions - Page 2

SilvrEclipse · #16 09-09-2007, 10:11 AM

Are you trying to get rid of the second o2 altogether? As far as I know you cant eliminate the sensor completely.
I dont think it matters which way the resister and capacitor are.

Black99GST · #17 09-09-2007, 02:56 PM

Quote:

Originally Posted by SilvrEclipse

As far as I know you cant eliminate the sensor completely.
I dont think it matters which way the resister and capacitor are.

oh Shit! well thats what i need to do, i followed the directions found http://www.dsmtuners.com/forums/showthread.php?t=221951
and here is what i came up with:

had it on the car for about 3 weeks (dont drive the car that often) and the cel came on the other day... as explained earlier... WTF? any ideas on how to get the ECU to think my Rear o2 is their? i need to maybe ask kevin... or Brian... bet they would know... u think?

SilvrEclipse · #18 09-09-2007, 03:02 PM

And that doesn't work? I would watch those resisters to make sure they aren't getting to hot. The problem I see is that that type of setup only gives the ecu a constant reading so the computer picks that up as an error bc the signal isin't changing. With the sensor connected the signal varies but the resister and capacitor slow the reading down so that the cel isin't triggered for no cat.

Black99GST · #19 09-09-2007, 03:11 PM

Quote:

Originally Posted by SilvrEclipse

And that doesn't work? I would watch those resisters to make sure they aren't getting to hot. The problem I see is that that type of setup only gives the ecu a constant reading so the computer picks that up as an error bc the signal isin't changing. With the sensor connected the signal varies but the resister and capacitor slow the reading down so that the cel isin't triggered for no cat.

hmm... so u think i chould tee off the factory o2 from my one sencor hole in the exhaust? like... thread a tee into the hole, put wideband in one, and the factory in the other and still get good wideband readings? can i get a pic of what you did? so i can see what restrictors and capacitors you are talking about?

SilvrEclipse · #20 09-09-2007, 04:28 PM

I wouldn't recommend T-ing off the sensor, the WB needs to be in the exhaust stream. There is a link on page 1 of how mine is set up. You might just need to weld another bung in your exhaust for the WB.

kjewer1 · #21 09-11-2007, 04:02 AM

DSM ECUs don't really care what the rear O2 absolute voltage is, AFAIK. All the ECU is looking for is that the rear sensor signal is not cycling like the front one is. Back in the day many people had good success just tying the sensor up somewhere where it won't start a fire. This is where wrapping it in foil came from, to protect the car from the heat. The sensor will provide a low, flat voltage to the ECU. This is usually enough to keep it happy. The anti-foulers only limit the sensors exposure to the exhaust gas, to slow down the cycling. These have been reported to work pretty well for people on the EVO forums, worth a shot.

With more modern cars, the ECUs are a little smarter. They force the AFR to change at certain intervals to ensure the sensors respond as expected.

There are also ways to force the readiness tests to "pass," but this gets more complicated.

Black99GST · #22 09-11-2007, 10:28 PM

AFAIK??? so your telling me to take the sencor out of the pipe and to wrap it in foil? and that will take care of my cel? *i was hoping you would stop buy and drop some knowlege keven!*

kjewer1 · #23 09-11-2007, 11:06 PM

The only way to find out if it will work on your car is to try it.

Black99GST · #24 09-11-2007, 11:19 PM

point taken... ok! thanks buddy! how would you suggest I tie it up?

SilvrEclipse · #25 09-11-2007, 11:24 PM

Zip tie that bitch up there

defiancy · #26 09-12-2007, 10:30 AM

This is the wierdest thing I have ever heard of. I will have to give it a try.

Black99GST · #27 09-12-2007, 03:27 PM

will i have to drive another 500 miles to reset the cel? because it didnt turn off right away... i should know this, but you know... might as well ask to just make sure...

SilvrEclipse · #28 09-12-2007, 03:36 PM

so you wired the sensor back up and wrapped it in foil? It will take a few days to go off.

defiancy · #29 09-12-2007, 03:58 PM

Quote:

Originally Posted by Black99GST

will i have to drive another 500 miles to reset the cel? because it didnt turn off right away... i should know this, but you know... might as well ask to just make sure...

Did you try removing the battery leads for 10 seconds and reconnecting them? This should reset the computer.

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