Oxygen Sensors
Thread Starter
4th Gear
Joined: May 2002
Posts: 4
Likes: 0
From: Patrick Springs VA
Oxygen Sensors
I have a 93 LT1 and I am wondering about taking the cats off and going with off road pipes, but I'm thinking I need a oxygen simulator. Is this the case or will it be ok without the o2 sensors? I have tried to find the sims for sale on the web but no luck, they are single wire and all I have been able to find are 4 wire sims. Any ideas?
Thanks
Thanks
Pro
Joined: Jan 2002
Posts: 702
Likes: 0
From: York PA
Re: Oxygen Sensors (deshort)
I believe on the 93's the O2 sensors are before the cats. You must have them for the car to regulate air to fuel ratio. I think a better idea would be to install high flow cats and a good cat-back exhaust. You get about the same results as removing them, and you don't have to worry about any future sniff tests.
Drifting
Joined: Mar 1999
Posts: 1,931
Likes: 1
From: Norcross GA
Re: Oxygen Sensors (HTRK-1)
The 93 is an 0bd1 system,... hence should only have sensors before the cats. i.e. No after-cat sensors = no sim's needed.
You need the pre-cat sensors to get to closed loop operation. i.e. Real bad idea to remove all O2 sensors. Can be done,... just not a good idea.
Single wire O2's are not heated. Another hint that say's you don't have after-cat O2's.
BTW Sims only replace the after-cat O2's, not the pre-cat.
[Modified by ZylaRace, 2:57 PM 6/6/2003]
You need the pre-cat sensors to get to closed loop operation. i.e. Real bad idea to remove all O2 sensors. Can be done,... just not a good idea.
Single wire O2's are not heated. Another hint that say's you don't have after-cat O2's.
BTW Sims only replace the after-cat O2's, not the pre-cat.
[Modified by ZylaRace, 2:57 PM 6/6/2003]
Drifting
Joined: Jul 2002
Posts: 1,273
Likes: 0
From: Olathe, KS USA
Re: Oxygen Sensors (deshort)
I don't like the the idea of sims, they just tells the ecm what is wants to hear not what is actually going on with the AFR. You can leave the stock down pipe in place with O2 bungs and just cut out the cat and install a short pipe.
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
Re: Oxygen Sensors (C4Crazy787)
Don't use the sims. They will not allow the computer to do what it needs to do. I have an exhaust guy tell me that is what I am suppose to, should be running. What an idiot. When I started asking him how the ECM worked he didn't even know what open and closed loop meant. :lolg:
Instructor
Joined: May 2003
Posts: 104
Likes: 0
From: Ocean City MD
Re: Oxygen Sensors (deshort)
With obd1 you can take your cats off without having to worry about your O2's..(as long as they are still there)...The only rumor is that it may take longer for the sensors to warm up due to less restriction by the cats....let that baby air out...as long as you do not have emmissions testing..Good luck
KDD
[Modified by buell_freak, 3:20 PM 6/6/2003]
KDD
[Modified by buell_freak, 3:20 PM 6/6/2003]
