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cfg83 · 11-29-2009, 04:15 AM

ProtractedSilence -

I just enabled this for my previously non-heated narrow-band 02 sensor. Now I can *see* the 02 sensor in the exhaust manifold heat up using my digital AFR gauge :

http://ecomodder.com/forum/showthrea...2-a-10921.html

My post-cat 02 sensor is already heated, so nothing to do there.

However, it doesn't appear that my ECU/PCM is taking advantage of the pre-heated 02 sensor, or at least I can't prove it. My reason for doing this mod was for emissions and *hopefully* quicker switching to closed-loop operation after EOC and engine-off at stoplights.

I think anyone can test your friend's advice if they have a ScanGauge and all of their 02 sensors are wired for self-heating. The driver just has to compare how fast the car goes into closed-loop operation.

I agree it's a small benefit, but I like the idea of it nonetheless.

CarloSW2

11-29-2009, 04:15 AM	#4 (permalink)
cfg83 Pokémoderator Join Date: Dec 2007 Location: Southern California Posts: 5,864 1999 Saturn SW2 - '99 Saturn SW2 Wagon Team Saturn 90 day: 40.49 mpg (US) Thanks: 439 Thanked 530 Times in 356 Posts	ProtractedSilence - I just enabled this for my previously non-heated narrow-band 02 sensor. Now I can see the 02 sensor in the exhaust manifold heat up using my digital AFR gauge : http://ecomodder.com/forum/showthrea...2-a-10921.html My post-cat 02 sensor is already heated, so nothing to do there. However, it doesn't appear that my ECU/PCM is taking advantage of the pre-heated 02 sensor, or at least I can't prove it. My reason for doing this mod was for emissions and hopefully quicker switching to closed-loop operation after EOC and engine-off at stoplights. I think anyone can test your friend's advice if they have a ScanGauge and all of their 02 sensors are wired for self-heating. The driver just has to compare how fast the car goes into closed-loop operation. I agree it's a small benefit, but I like the idea of it nonetheless. CarloSW2 __________________ *What's your* EPA MPG? Go Here and find out!** American Solar Energy Society