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Only Have One Oxygen Sensor Hooked Up?

1K views 9 replies 6 participants last post by  SALIV8 
#1 ·
On my 88 GT is it bad to have only one oxygen sensor disconected? Is it robbing horsepower???
 
#3 ·
Wow thanks for the fast reply. Greatly appreciated
 
#6 ·
My 88 ran best with both O2 sensors disconnected back when it had SD. A little rich at idle, but a lot meaner between 1500 and 3000 rpms.
 
#7 ·
how does that benifit having both diconnected? where is the gain coming from?
 
#9 ·
If you have intake and head upgrades, sometimes it actually helps out not having the O2 sensors connected on a SD system...but yeah, in general they should be hooked up if you want decent gas mileage.
 
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