I recently converted my 2wd sierra to stage 3. Since then it will not idle correctly, it is hunting. Also it seems to be running very rich, but this was a problem before stage 3 conversion.

Suggestions Please!

Thanks in advance

Andy

 

So it was running rich/badly before the mod to stg3.
I would be tempted to change the CTS, then set CO to what chip maker says, then adjust base idle, check your fuel pressure is as needs to be for chip.
tabetha