02 sensor signal reading question
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Joined: Nov 2006
Posts: 1,698
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From: Connecticut
Car: 1987 Camaro, 1986 Trans AM
Engine: V6 2.8 multi-port and V8 5.0 FI
Transmission: 5-Speed and Automatic
Axle/Gears: no idea
02 sensor signal reading question
i installed a 3wire heated o2 sensor.
and i also installed a digital 02 gauge with a bar graph that goes up n down reading between rich/lean
once the car has fully warmed up does the o2 sensor supposed to have a steady straight constant reading or is it supposed to constantly slightly bounce a few .volts all the time?
i only ask because my bar graph display is constantly jumping slowly between rich and lean mostly stays somewhere in the middle but not sure if its suppsoed to keep changing bars up n down so much
any one know how the o2 sends a signal to the ecm?
and i also installed a digital 02 gauge with a bar graph that goes up n down reading between rich/lean
once the car has fully warmed up does the o2 sensor supposed to have a steady straight constant reading or is it supposed to constantly slightly bounce a few .volts all the time?
i only ask because my bar graph display is constantly jumping slowly between rich and lean mostly stays somewhere in the middle but not sure if its suppsoed to keep changing bars up n down so much
any one know how the o2 sends a signal to the ecm?
Joined: Apr 2005
Posts: 7,736
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From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: 02 sensor signal reading question
because my bar graph display is constantly jumping slowly between rich and lean mostly stays somewhere in the middle but not sure if its suppsoed to keep changing bars up n down so much
If it stays still you have a problem.The ECM is constantly adjusting the fuel to achieve the tune so the O2 reading should be moving
If it stays still you have a problem.The ECM is constantly adjusting the fuel to achieve the tune so the O2 reading should be moving
Last edited by vetteoz; May 24, 2008 at 02:09 AM.
Thread Starter
Joined: Nov 2006
Posts: 1,698
Likes: 0
From: Connecticut
Car: 1987 Camaro, 1986 Trans AM
Engine: V6 2.8 multi-port and V8 5.0 FI
Transmission: 5-Speed and Automatic
Axle/Gears: no idea
Re: 02 sensor signal reading question
great thanks a bunch
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