Oxygen Sensor Monitoring
10-28-2013, 05:33 PM
#1
Member
Thread Starter
Join Date: Nov 2010
Location: Raleigh
Posts: 162
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 Iroc Z 5.7L
Engine: 5.7L
Transmission: T56
Axle/Gears: built 4.10s
Oxygen Sensor Monitoring
Guys,
Running shorty hedmen headers and a single wire O2 sensor. Had to add a ground wire to get rid of idiot light and get a reading from the O2 sensor. Now monitoring the ECM and the O2 reading is all over the board, is that normal? Added a zip with the V5 file in case anyone can help me to figure this out. Not sure if a hotwire setup would fix this or if there is something else causing the O2 reading to jump all over the place.
Reference:
350 TPI
700R
built 3.08 10 bolt Locker
Edelbrock intake manifold with ARP bolts
SLP Runners
Hedman Headers and Y-Pipe
Flowmaster cat back
Descreened MAF
Custom chip
MSD 6A digital, wires, coil
Bosch plugs
24 lb injectors
255 Walbro fuel pump and wiring kit
K&N filters
Founders control arms, panhard arm, relocation bracket, strut mounts
UMI strut brace
SLP Torque Arm
Sophn tie rod Adjusters
Energy Suspension Front Control Arm Bushing
Energy Suspension Motor Mounts
16" Iroc Wheels
Running shorty hedmen headers and a single wire O2 sensor. Had to add a ground wire to get rid of idiot light and get a reading from the O2 sensor. Now monitoring the ECM and the O2 reading is all over the board, is that normal? Added a zip with the V5 file in case anyone can help me to figure this out. Not sure if a hotwire setup would fix this or if there is something else causing the O2 reading to jump all over the place.
Reference:
350 TPI
700R
built 3.08 10 bolt Locker
Edelbrock intake manifold with ARP bolts
SLP Runners
Hedman Headers and Y-Pipe
Flowmaster cat back
Descreened MAF
Custom chip
MSD 6A digital, wires, coil
Bosch plugs
24 lb injectors
255 Walbro fuel pump and wiring kit
K&N filters
Founders control arms, panhard arm, relocation bracket, strut mounts
UMI strut brace
SLP Torque Arm
Sophn tie rod Adjusters
Energy Suspension Front Control Arm Bushing
Energy Suspension Motor Mounts
16" Iroc Wheels
10-28-2013, 05:57 PM
#2
Supreme Member
iTrader: (-3)
Join Date: Dec 2012
Posts: 1,184
Likes: 0
Received 1 Like
on
1 Post
Car: 1991 firebird
Engine: TBI 305 (built)
Transmission: T5
Axle/Gears: 4.10
Get a 3-4 wire ... I put shorties on my bird and O2 wouldn't get hot enough to go into closed loop unless u were driving at 2000+ RPM ... Heated is the only way to go fixed a lot of driveability and tuning issues for me
11-25-2013, 12:36 PM
#3
Member
Thread Starter
Join Date: Nov 2010
Location: Raleigh
Posts: 162
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 Iroc Z 5.7L
Engine: 5.7L
Transmission: T56
Axle/Gears: built 4.10s
Re: Oxygen Sensor Monitoring
Just installed my 3 wire oxygen sensor and what a difference. Car does not have a high idle forever on start-up or cold days and no more surging at a stop lights when the motor comes back to an idle. Need to hook up the laptop and monitor it.
11-26-2013, 10:13 AM
#4
Member
Join Date: Oct 2005
Location: Dyer, In
Posts: 330
Likes: 0
Received 0 Likes
on
0 Posts
Car: 91 Camaro RS
Engine: 355 Vortec
Transmission: 700r4
Axle/Gears: 3.42
Re: Oxygen Sensor Monitoring
Good to hear, I need to do the same thing. Where did you connect the heater into?
Last edited by alvanwie; 11-27-2013 at 07:07 PM.
11-26-2013, 11:19 AM
#5
Member
Thread Starter
Join Date: Nov 2010
Location: Raleigh
Posts: 162
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 Iroc Z 5.7L
Engine: 5.7L
Transmission: T56
Axle/Gears: built 4.10s
Re: Oxygen Sensor Monitoring
First let me start by saying I am not an electrician nor an electrical engineer.
I tied into the factory fuel pump relay by the brake buster only because I am running an external racetronix fuel pump wiring harness and a walbro 255 fuel pump. Now the factory wiring harness and fuel pump relay are now only used as a power source for the new racetronix relay, that is why I felt comfortable tying into there. I read many people on TGO tied into the MAF line but for my setup this seemed cleaner and better.
I don't have a picture of my setup and connector soldering job with me but here is a picture of my racetronix wiring harness coming off the alternator. This also was a great upgrade for my IROC.
Also, here is a picture of the relays I found online.
I tied into the factory fuel pump relay by the brake buster only because I am running an external racetronix fuel pump wiring harness and a walbro 255 fuel pump. Now the factory wiring harness and fuel pump relay are now only used as a power source for the new racetronix relay, that is why I felt comfortable tying into there. I read many people on TGO tied into the MAF line but for my setup this seemed cleaner and better.
I don't have a picture of my setup and connector soldering job with me but here is a picture of my racetronix wiring harness coming off the alternator. This also was a great upgrade for my IROC.
Also, here is a picture of the relays I found online.
Last edited by rwstegne; 11-26-2013 at 07:03 PM.
Thread
Thread Starter
Forum
Replies
Last Post
HoosierinWA
Tech / General Engine
5
10-07-2015 10:15 AM