That's too bad. Are the readings post CATs just not useful? Why can you dyno run with a tailpipe A/F reader? Is that not really reliable?
Mounting a wideband 02?
Thread Starter
Instructor
Joined: Oct 2002
Posts: 181
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From: Windham NH
Mounting a wideband 02?
Does it matter where in the exhaust flow the wideband is located? In other words... say I already have a bung where rear O2s go and they get <cough> deleted. Can I use that bung for the wideband O2 sensor? Does it matter if it is after the cats or before?
Thanks,
--Bill
Thanks,
--Bill
Safety Car
Joined: Nov 2003
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From: San Diego, CA "leaf" "tee" "e"
Cats clean the exhaust air. I wouldn't expect the air after the cats to accurately represent the air used by the engine. Cats help me exhaust gases in poorly running engines look great. Properly running and tuned engines don't need cats to pass the sniffer test in California with flying colors....passing the visual inspection is another story.
Safety Car
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From: Indianapolis Indiana
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Has anyone welded a bung in the SuperMaxx headers?
Would there be an issue with my PLX wideband if I just placed it in the stock bung before the cats?
Would there be an issue with my PLX wideband if I just placed it in the stock bung before the cats?
Resident moron
Joined: Jun 2003
Posts: 4,746
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From: Assachusetts
I wouldn't think there'd be any difference.
Ever dyno your car? They stick a sensor in your tailpipe. You'd think it wouldn't work but it does.
I think cats must burn off stuff that isn't indicative of your A/F ratio (if that makes any sense). Or maybe it only burns off so much of it, so that you still get an accurate A/F reading.
Dope
Ever dyno your car? They stick a sensor in your tailpipe. You'd think it wouldn't work but it does.
I think cats must burn off stuff that isn't indicative of your A/F ratio (if that makes any sense). Or maybe it only burns off so much of it, so that you still get an accurate A/F reading.
Dope
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Melting Slicks
Joined: Feb 2002
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From: Winston Salem NC
Originally Posted by Dope
I wouldn't think there'd be any difference.
Ever dyno your car? They stick a sensor in your tailpipe. You'd think it wouldn't work but it does.
I think cats must burn off stuff that isn't indicative of your A/F ratio (if that makes any sense). Or maybe it only burns off so much of it, so that you still get an accurate A/F reading.
Dope
Ever dyno your car? They stick a sensor in your tailpipe. You'd think it wouldn't work but it does.
I think cats must burn off stuff that isn't indicative of your A/F ratio (if that makes any sense). Or maybe it only burns off so much of it, so that you still get an accurate A/F reading.
Dope
Drifting
Joined: May 1999
Posts: 1,580
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From: Shelbyville KY
Originally Posted by BQuicksilver
Has anyone welded a bung in the SuperMaxx headers?
Would there be an issue with my PLX wideband if I just placed it in the stock bung before the cats?
Would there be an issue with my PLX wideband if I just placed it in the stock bung before the cats?
Safety Car
Joined: Dec 2001
Posts: 4,295
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From: Indianapolis Indiana
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Originally Posted by AllCammedUp
if you're going to install the WB02 in the pre-welded bung that the stock narrow-band 02 sensor goes in, then prepare to run some wire from the narrow-band output on the wide-band controller back down to the factory 02 harness so the PCM can pick up the narrow-band signal.
