AFR ERRATIC. ANY THOUGHT?

swies said

I would understand if it was hunting. It is 'ALL' over the entire spectrum and will not settle at any rpm or temp. It is not just a 1.5-2 point swing. I do have the Bosch O2 sensor that came with the kit. Power and Ground were supplied direct from battery but do run through the same firewall pass through that the tach wire does from the distributor to the tach. I am thinking this may be giving me some EMR that is bleeding onto the AFR signal wire since it is reading Vdc.

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During Crusing/Idle or WOT? One should constantly range back and forth a lot. WOT should be fixed once the car starts to Eat!

Also putting raw gas on the sensor is a no no. The sensor needs to get up to temp too, about 600 degrees off the top of my head.

I have never experienced any elec interference issues and have always used Innovate products. One of their features in a Free Air Calibration, done in the exhaust when it is completely free of any residual fumes. This recals the sensor.

Is this you first wide band afr gage? I have been using them for 17 years. on both NA and Boosted applications.

Marion