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Garage Queen Club
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Discussion Starter #1
Anyone experience this issue? The AEM shows my FJO wideband signal fluctuating every 100ms .4 AFR (the gauge reads steady). Are there sensitivity adjustments I need to make on the AEM? I've tried two ECU grounds and one chassis ground with no difference. The AEM readings seem to track properly, but I can't get a solid reading ever.
 

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Anyone experience this issue? The AEM shows my FJO wideband signal fluctuating every 100ms .4 AFR (the gauge reads steady). Are there sensitivity adjustments I need to make on the AEM? I've tried two ECU grounds and one chassis ground with no difference. The AEM readings seem to track properly, but I can't get a solid reading ever.
Have you been able to monitor the voltage output from the FJO with a scope or some other unfiltered device?

Are any other sensors on the AEM stepping like this or just the FJO input?
 

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Discussion Starter #3
Just the FJO. All other sensors are solid. Let me hook up my scope right now...
 

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Discussion Starter #4 (Edited)
Solid on the scope. I'm using the FJO LEGACY output (non linear). Not sure what the AEM Wizard configures to, since the FJO has a second tan wire output which is .5v~4.5v curve.
 
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