Standard O2 sensors...
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Re: Standard O2 sensors... (Daniel DK)
Stock was probably AC Delco, 1 wire. If you want to move them further down the pipe you might need to convert to heated ones.
If you don't mind me asking why? Doing headers or something?
If you don't mind me asking why? Doing headers or something?
Thread Starter
Burning Brakes
Joined: Oct 2001
Posts: 1,135
Likes: 17
Re: Standard O2 sensors... (Nathan Plemons)
i've never seen the stock setup - there isn't excatly a lot of vettes around where i live.. :sad: Mine has an aftermarket borla catback system and some custom fabricated stainless 3" pipe. The two cats have been replaced by a single cat after the Y pipe. I'm having some problems with it running way rich (datamaster displays around 64 blm!!!) and i'm suspecting the o2s aren't working like they should. i'm a TOTAL newbie to datamaster and scanning software in general... so i really don't know what an healty o2 censor should look like..
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Re: Standard O2 sensors... (Daniel DK)
Who the hell would replace a dual cat setup with a single cat?
The way it is supposed to work is simple, it should have one O2 sensor on either manifold before the stock cats. This puts them pretty far forward which they need to be since they are unheated sensors. If they are further down the pipes they may not be getting hot enough to work properly.
You're right the BLM's are way out of wack. The O2 sensors have to be giving it some data otherwise it wouldn't be creating those strange BLM's. Basically it's creating that strange BLM based on the readings it is getting from the O2 sensors. What you'll want to look at is the O2 sensor voltages. It should bounce back and forth between .100 (lean) and .900 (rich). .500 should be stoich
The way it is supposed to work is simple, it should have one O2 sensor on either manifold before the stock cats. This puts them pretty far forward which they need to be since they are unheated sensors. If they are further down the pipes they may not be getting hot enough to work properly.
You're right the BLM's are way out of wack. The O2 sensors have to be giving it some data otherwise it wouldn't be creating those strange BLM's. Basically it's creating that strange BLM based on the readings it is getting from the O2 sensors. What you'll want to look at is the O2 sensor voltages. It should bounce back and forth between .100 (lean) and .900 (rich). .500 should be stoich
Thread Starter
Burning Brakes
Joined: Oct 2001
Posts: 1,135
Likes: 17
Re: Standard O2 sensors... (Nathan Plemons)
Who the hell would replace a dual cat setup with a single cat?
The way it is supposed to work is simple, it should have one O2 sensor on either manifold before the stock cats. This puts them pretty far forward which they need to be since they are unheated sensors. If they are further down the pipes they may not be getting hot enough to work properly.
You're right the BLM's are way out of wack. The O2 sensors have to be giving it some data otherwise it wouldn't be creating those strange BLM's. Basically it's creating that strange BLM based on the readings it is getting from the O2 sensors. What you'll want to look at is the O2 sensor voltages. It should bounce back and forth between .100 (lean) and .900 (rich). .500 should be stoich
I think ill be lurking some more in the scan/tune section :)
:cheers:
Daniel
Thread Starter
Burning Brakes
Joined: Oct 2001
Posts: 1,135
Likes: 17
Re: Standard O2 sensors... (ittlfly)
When I replaced mine, I ordered new OEM through Jeff @ Superior Chev. He sent me 2 Bosh. I'm guessing there're OEM.
now all i need is a part# from bosh
:cheers:
Daniel
