Well, I have driven my suburban almost 5k miles since replacing the transfer case and adding an lift pump manual relay. I made the mistake of moving the optical sensor after watching a video, wrong answer 
,now the truck runs great except after it warms up it will not idle smoothly in neutral, it will idle smoothly in drive sitting still. I had to go into the optical sensor 5-6 times to get drivable power back. Should I consider trying to adjust the os again ? I live in a cold weather situation, the truck will idle alot during the winter.
,now the truck runs great except after it warms up it will not idle smoothly in neutral, it will idle smoothly in drive sitting still. I had to go into the optical sensor 5-6 times to get drivable power back. Should I consider trying to adjust the os again ? I live in a cold weather situation, the truck will idle alot during the winter.