chuckr

I just had a by-pass pipe installed on my 83SC.Before I took her in my idle speed was
varing between 800 and 1000rpm,it wasn't bad
so I kinda ignored it.The lambda sensor was
out for the swap and I was told the sensor
was the reason for the unstable idle speed.
It was recommended to unplug the sensor.
I was told no harm would be caused and the
only negitive effect would be a possible
reduction in gas milage.My question is
do I need the sensor ??