How many O2 sensors on a TBI car ?
Thread Starter
Junior Member
Joined: Dec 2002
Posts: 75
Likes: 0
From: North Carolina
Car: 1989 Firebird Formula
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 3.08
How many O2 sensors on a TBI car ?
Hi all !
I have a 1989 formula and want to know how many O2 sensors came with TBI cars ? I would think two , but hey you never know.
Thanks,
Joe
( sorry I cannot go look as I cannot walk at the moment , I have broken legs due to a car accident )
I have a 1989 formula and want to know how many O2 sensors came with TBI cars ? I would think two , but hey you never know.
Thanks,
Joe
( sorry I cannot go look as I cannot walk at the moment , I have broken legs due to a car accident )
Supreme Member
Joined: Jan 2007
Posts: 1,873
Likes: 0
From: OC CA
Car: 75 Beast
Engine: 383 +EBL Flash
Transmission: 700R4
Axle/Gears: 4.11 with 33"
Re: How many O2 sensors on a TBI car ?
Joe
From factory you car was equiped with C3 ECM which can only monitor a single NBO.
//RF
From factory you car was equiped with C3 ECM which can only monitor a single NBO.
//RF
Thread Starter
Junior Member
Joined: Dec 2002
Posts: 75
Likes: 0
From: North Carolina
Car: 1989 Firebird Formula
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 3.08
Re: How many O2 sensors on a TBI car ?
Much thanks ! 
I have a lead on a set of headers and Y-pipe for $200 and needed the info for that . The headers only have 1 O2 sensor bung and it threw me off .
Its been a long time for me and Thirdgens . I have been in 4th gen land since 2004 . Ahhhh its good to be back . . .
I have a lead on a set of headers and Y-pipe for $200 and needed the info for that . The headers only have 1 O2 sensor bung and it threw me off .
Its been a long time for me and Thirdgens . I have been in 4th gen land since 2004 . Ahhhh its good to be back . . .
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: How many O2 sensors on a TBI car ?
All V8 thirdgens came with one O2 sensor in the driver's side exhaust manifold. I think the V6's had it in the y-pipe.
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