cat's ??
Race Director
Joined: Aug 2002
Posts: 16,024
Likes: 0
From: Stratford Ontario
You are right, the sensors are forward of the cats (at least in my 95 they are). You should not get a code, but mine aren't gutted so I don't know for sure.
To connect this topic with your other thread, I would just replace the cats; they're there for a reason and if your dropping the exhaust to gut them why not just replace them. Might consider new O2 sensors at the same time depending on their condition.
To connect this topic with your other thread, I would just replace the cats; they're there for a reason and if your dropping the exhaust to gut them why not just replace them. Might consider new O2 sensors at the same time depending on their condition.
Melting Slicks
Joined: Apr 2004
Posts: 3,287
Likes: 7
From: n/a SC
Well I read on the net jsut the other day and it said not do to it if you have a 94 or later.......I don't remember how it's setup on my 95 off hand but I did read that.
maybe ur ok to do it then if so go for it I saw a gain when I did it to my truck.
maybe ur ok to do it then if so go for it I saw a gain when I did it to my truck.
Melting Slicks
Joined: Apr 2004
Posts: 3,287
Likes: 7
From: n/a SC
I found the site I read it on look.
"1. Gutted catalytic converters. Don't do this on 94 and later Corvettes. 94 and later Corvettes have a O2 sensor AFTER the cat which monitors the effectiveness of the catalytic converter. Gut the converters and you'll get a check engine light. This is one of the reasons I tell people to buy a 92 or 93 model to modify."
here is the site
http://home.alltel.net/wayne/faq.html#Removing Catalytic Converters
"1. Gutted catalytic converters. Don't do this on 94 and later Corvettes. 94 and later Corvettes have a O2 sensor AFTER the cat which monitors the effectiveness of the catalytic converter. Gut the converters and you'll get a check engine light. This is one of the reasons I tell people to buy a 92 or 93 model to modify."
here is the site
http://home.alltel.net/wayne/faq.html#Removing Catalytic Converters
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Burning Brakes
Joined: Jul 2002
Posts: 1,027
Likes: 245
From: Boise ID
I have a 94 and the passenger side cat has an O2 sensor directly after it. I am intimately acquainted with it since I had to monkey with that cat quite a bit to change the starter yesterday.
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
hm... I read something here recently... the 94s had after O2s, but they were dummys.
a lot of queer things went on in the mid 90s in prep for the transition to OBDII. But 94 and 95 cars are STILL ODBI cars.
The exhaust folks, such as Corsa, do not distinquish a difference in their systems until 1996 (extra O2s).
I would be curious to see what would happen if any downstream O2s were removed from one of these cars.
a lot of queer things went on in the mid 90s in prep for the transition to OBDII. But 94 and 95 cars are STILL ODBI cars.
The exhaust folks, such as Corsa, do not distinquish a difference in their systems until 1996 (extra O2s).
I would be curious to see what would happen if any downstream O2s were removed from one of these cars.
Race Director
Joined: Aug 2002
Posts: 16,024
Likes: 0
From: Stratford Ontario
I was under my car last night putting in a new slave cyl. and I noticed the one on the passenger side (it was upstream) I didn't look close on the driver side but I'm sure I would have noticed one downstream if it was there.
Last edited by Irish Mike; Jul 28, 2004 at 01:18 PM.
Racer
Joined: Apr 2002
Posts: 342
Likes: 0
From: new orleans La
Originally Posted by bogus
hm... I read something here recently... the 94s had after O2s, but they were dummys.
a lot of queer things went on in the mid 90s in prep for the transition to OBDII. But 94 and 95 cars are STILL ODBI cars.
The exhaust folks, such as Corsa, do not distinquish a difference in their systems until 1996 (extra O2s).
I would be curious to see what would happen if any downstream O2s were removed from one of these cars.
a lot of queer things went on in the mid 90s in prep for the transition to OBDII. But 94 and 95 cars are STILL ODBI cars.
The exhaust folks, such as Corsa, do not distinquish a difference in their systems until 1996 (extra O2s).
I would be curious to see what would happen if any downstream O2s were removed from one of these cars.
Engine runs and sounds awesome, although that is with open headers because I'm still waiting for me header extentions and 4.10 rear to arrive
Drifting
Joined: Nov 2002
Posts: 1,365
Likes: 3
From: Huntsville AL
Originally Posted by bogus
hm... I read something here recently... the 94s had after O2s, but they were dummys.
a lot of queer things went on in the mid 90s in prep for the transition to OBDII. But 94 and 95 cars are STILL ODBI cars.
The exhaust folks, such as Corsa, do not distinquish a difference in their systems until 1996 (extra O2s).
I would be curious to see what would happen if any downstream O2s were removed from one of these cars.
a lot of queer things went on in the mid 90s in prep for the transition to OBDII. But 94 and 95 cars are STILL ODBI cars.
The exhaust folks, such as Corsa, do not distinquish a difference in their systems until 1996 (extra O2s).
I would be curious to see what would happen if any downstream O2s were removed from one of these cars.
My 94 Corvette has ONE O2 sensor behind the passenger cat. IT HAS NO EFFECT ON THE COMPUTER'S ENGINE MANAGEMENT FUNCTIONALITY.
These O2 sensors were placed in 94-95 cars during the OBD 1 to OBD 2 transition. It was used by dealerships and service centers to take data that would later be used in OBD II engine management.
In other words, as far as you're concerned it doesn't even exist. You can just remove it, won't make a bit of difference.
