Wideband O2 STS turbo mounting??
Wideband O2 STS turbo mounting?? I just got an AEM UEGO A/F gauge. The instructions say to mount the 02 Sensor before the cats but after the turbo. I have an STS and that just isn't going to happen 
WHAT TO DO??? WHAT TO DO???? I don't really want to gut my cats
WHAT TO DO??? WHAT TO DO???? I don't really want to gut my cats
mount it in the same location before the cats,ill be installing mine hopefully soon also. their was a tread about this awhile back not sure if you can search for it or not,but i thought they said the reading are gonna be off a little bit.
I mounted mine in the tailpipe, about 8" past the turbo. My closed loop readings are dead on at 14.7:1 A/F, so it seems to be working right. I've heard people say that the exhaust pressure before the turbo can skew the sensor readings. I am running cats also, and they don't seem to affect the readings.
Originally Posted by Camaro_freak
I mounted mine in the tailpipe, about 8" past the turbo. My closed loop readings are dead on at 14.7:1 A/F, so it seems to be working right. I've heard people say that the exhaust pressure before the turbo can skew the sensor readings. I am running cats also, and they don't seem to affect the readings.
Did you have the A/F checked with another tester? to confirm they read the same?
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It is a an AEM 30-4100 UEGO controller. I just got off the phone with AEM they said "The gauge was not designed to work in this situation, it must go as far back as possible, but it MUST be before cats to be accurate."
So damned if you do....damned if you don't. I am going to go just before one of the cats I guess????
So damned if you do....damned if you don't. I am going to go just before one of the cats I guess????
Originally Posted by ZL1Killa
read mine near the end of the tailpipe and had another checking up front... reads fine
Originally Posted by zapp168
Did you have the A/F checked with another tester? to confirm they read the same?
I put my WB about 8" after the turbo on my STS. I ran and tuned WITH cats for about 8 months without problem. I then went to an ORY and deleted the cats. BEN factors with EFILive where within 1-3% (thats pretty damn close 
), since I run in open loop all the time. The difference was probably more from a less restrictive exhaust then from going though the cats. 
There is some real world before and after for ya
), since I run in open loop all the time. The difference was probably more from a less restrictive exhaust then from going though the cats. There is some real world before and after for ya
Last edited by kbracing96; Apr 3, 2007 at 02:23 PM.
Did you use O2 sims after getting rid of you one stock O2 to put the guage in
Originally Posted by pdanrichey
Screw the cats...gut or get rid of IMO. I have no cats so I used my rear O2 bung on the passenger side for the wideband.
I have no cats and I tried it in the y-pipe. It gave me funny readings except at idle or light cruise, where it was perfect 14.7. I put it on the turbo exhaust and it reads right.
Originally Posted by zapp168
It is a an AEM 30-4100 UEGO controller. I just got off the phone with AEM they said "The gauge was not designed to work in this situation, it must go as far back as possible, but it MUST be before cats to be accurate."
So damned if you do....damned if you don't. I am going to go just before one of the cats I guess????
So damned if you do....damned if you don't. I am going to go just before one of the cats I guess????
