Apparently, when your wideband dies...

[99SL2_Modder]

Originally Posted by SovXietday

Honestly sounds to me like you're relying on the wideband TO BE your tune.

By this of course I mean that megasquirt is making adjustments based off of what the wideband is reading. Which is why, when it took a ****, so did your tune.

What you really should do is take a few hours, disable closed loop all together, and fine tune your driving to be in the AFRs that you want. THEN turn closed loop back on. This way the ECU will only need to make minor corrections if any at all and you will have better driveability and better gas mileage. Not to mention, if your O2 sensor takes another **** all you have to do is turn closed loop off again and you're back to not washing out your cylinders with $4.25/gal fuel.

This is what it's supposed to be doing.

But I can't remember how to get into those settings, #1, and #2, I can't tune and drive.