I am having issues with this wideband and wonder if anyone has had a similar issue.

I have the blue wire (heater ground) grounded to a ground block that is shared by the MS (and all sensors) and the green (main ground) and white (analog ground) wire wired to the same block. The block is grounded to the chassis.

At idle the AFR is around 7 and then irratically goes up to 20 and back to 7. The range is set at 10-20.

I originally had all three wire gounded to the chassis with the white and green being at one location and the blue at another but I had the same results.

I am not getting any error codes.

Are the readings comming from Logworks the same as Megatune? If they are, unplug the sensor, turn the ignition to the start position, then turn the key back to off. Plug the sensor back in and turn the key to the start position to recalibrate the sensor. Double check your settings in the LM programmer. Remove the sensor from the down pipe to make sure the initial calibration is accurate.

I will try a clean air recalibration.

Thanks.

A simple clean air calibration fixe the issue.

Good to hear you got it worked out. The LC-1 seems to read almost the opposite when it is lost, rich when it is lean, and supa' lean when it is rich.

It was all over the place makin gme believe the sensor was bad. In addition to a free air calibraton I also created a ground circuit for the MS and all sensors including the LC-1 that grounded to my block.

Thanks for your help.