does a CAT affect wideband reading at tail pipe?
10-26-2003, 10:40 PM
#1
0.5 BAR
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Join Date: Jul 2003
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does a CAT affect wideband reading at tail pipe?
went to dyno and they put the damn wideband sensor in my tail pipe, i got a cat so i would think the cat does something to change the a/f readings!!!
if it DOES change, can someone tell me which way does it skew the results? either more lean or more rich
i hope it's more lean, thus meaning i'm running a tad richer than actual readings..
if it DOES change, can someone tell me which way does it skew the results? either more lean or more rich
i hope it's more lean, thus meaning i'm running a tad richer than actual readings..
10-26-2003, 10:53 PM
#2
3.0 BAR
Join Date: Dec 2002
Posts: 3,396
Re:does a CAT affect wideband reading at tail pipe?
it sensing how much oxygen is in the mixture. no the cat wont affect it, but if you have a tiny exhaust leak itll suck air in and ---- the readings up badly..
the cat removes NOx. thats all. i think.
the cat removes NOx. thats all. i think.
10-26-2003, 11:15 PM
#3
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Re:does a CAT affect wideband reading at tail pipe?
no if you read the emission specs, it reduces CO and HC (hydro carbons, aka FUEL) emissions... here in ontario, we have to do this "drive clean" bullshit and you take 3 readings....
i'll post a pics of my readings
i'll post a pics of my readings
10-26-2003, 11:17 PM
#4
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Join Date: Dec 2002
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Re:does a CAT affect wideband reading at tail pipe?
a wideband doesnt measure either.
depending on how much O2 is still present after combusttion this is the reading the computer incorporated to make it better..
ive seen lotsa pics with cars and the WB o2 is on the tailpipe, so i think its fine.
depending on how much O2 is still present after combusttion this is the reading the computer incorporated to make it better..
ive seen lotsa pics with cars and the WB o2 is on the tailpipe, so i think its fine.
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