incorrect afr display

s300 and SManager software questions & answers
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jtr316
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Joined: Wed Mar 04, 2020 3:20 pm

incorrect afr display

Post by jtr316 »

It has been doing this off and on for awhile and I can't figure out why but my AFRs on Smanager latest version will sometimes display very low afr readings. at Idle it is sitting at 4.50 and under boost it goes 6-7-8s AFR. My AFRs on the AEM wideband controller are displaying normally 14s at idle.
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Spunkster
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Re: incorrect afr display

Post by Spunkster »

What input on the ECU are you using?
jtr316
Posts: 13
Joined: Wed Mar 04, 2020 3:20 pm

Re: incorrect afr display

Post by jtr316 »

D10. I grounded from the controller I grounded brown wire to a ground on the ecu harness, other ground is on the thermostat with the ecu.
jtr316
Posts: 13
Joined: Wed Mar 04, 2020 3:20 pm

Re: incorrect afr display

Post by jtr316 »

do you think it could be wiring related or my smanager? i've tried changing it to lamda and afr and it still doesn't change. I think it is just random when it works or not but majority of the time, I can't datalog my afrs.
jtr316
Posts: 13
Joined: Wed Mar 04, 2020 3:20 pm

Re: incorrect afr display

Post by jtr316 »

I might try swapping another wideband sensor and see if that fixes it. I've included calibration and datalog. Thank you
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Spunkster
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Re: incorrect afr display

Post by Spunkster »

It could just be a wiring related issue if it is doing it intermittently.
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