Wide band o2 sensor question
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Senior User
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From: maui.HI
Wide band o2 sensor question
I'm thinking of doing some modifications on my efi system and have read that an air/fuel monitor and wide band o2 sensor becomes an essential tool when doing mods which become out of the ecms range. Can you wire the ecm in parallel with the a/f monitor gauge to the wide band o2 sensor or is this a bad idea? If the answer is yes it can share the same w/b o2 then will the value readings be incorrect because it's being slpit? Thanks for any replies.
Post Fiend
Joined: Jan 1997
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From: Enjoying the real world.
The ECM is designed to use a narrow band O2 sensor. You do not wire the wide-band into it. Leave the stock sensors in and add a bung to screw in the wide-band. The wide-band is not needed because the ECM can't handle the mods, the wide-band is needed in order to custom tune it properly. If you're going extreme with mods take it to a tuner with a dyno and a wide-band to get it tuned properly. Once that is done you won't need a wide-band, unless you're tuning the ECM yourself.
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Senior User
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From: maui.HI
You know I really envy you guys with dyno shops just around the corner. There's only one on this island that will take outside customers and they don't have tuning capabilities for the eec-iv. Just one of the problems of living on a rock in the middle of the Pacific ocean LOL. The reason a wide band was suggested to me is to get a safe reading on a NOS kit I'm planning on a speed density system. At least I had my question answered. Thanks anyway Ken for the response.
Elder User
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From: Olathe, KS
There are WB 02 unit which provide a NB output to run your stock system. Many support datalog as well as display. If going that route you really want one that collects RPM as well. Couple cautions: WB 02s are not entirely accurate. Many events with the motor can "fool " them. (Still a good tool) Look for one that has a calibration process. NOS will also alter readings. Many forums cover the affects so should be easy to research.
FTE Legend
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From: Ottawa, Ontario
Innovate makes a series of widebands that have great features, the LC-1 is just $200, has programmable norrow and wide band outputs, has a calibration procedure, and can be connected to a laptop for datalogging and display and/or to a gauge. Innovate Motorsports Wideband Air/Fuel Ratio Tuning
The sensor can be connected to the EEC, a gauge, and a laptop simultaneously and the programmable portion means you can even alter the actual A/F ratio the engine computer targets.
The sensor can be connected to the EEC, a gauge, and a laptop simultaneously and the programmable portion means you can even alter the actual A/F ratio the engine computer targets.
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Postmaster
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From: Harrisburg, NE
not unless you have tweecer. otherwise all you could do is watch the readouts. I think he is saying that if you have all of the above (a programmable ecu, a laptop, and a guage) you can run them all off the one sensor
I started working on an emulator that could take in a wide band signal and put out the proper narrow band signal, but i haven't worked on that project for a while.
I started working on an emulator that could take in a wide band signal and put out the proper narrow band signal, but i haven't worked on that project for a while.
FTE Legend
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From: Ottawa, Ontario
No... this wideband setup is completely independent of the engine control system and it(the EEC) doesn't need to be programmable, the LC-1 narrowband output signal can be substituted for the factory sensor and then you have everything running off 1 sensor. I have run my truck this way however... it's does come with 1 little irritation, the recalibration sequence needs to be done fairly often and it requires removing the sensor from the exhaust. For temporary testing this setup works great but in the long term it's not practical IMO, better to leave the stock sensor in place and use the widband for tuning.
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