1988 Toy pickup SR 465K
I am exploring the mysteries of the vacuum system.
Can any of you tell me what this white screw is, circled in light blue?
With gratitude to the creator of this pic.
Thans

 

A/C idle adjustment screw

 

Thanks.That was fast.

 

Idle adjust...so when you make a turn that hits the stops of the power steering system it lowers the idle to prevent damaging the PS pump. Follow the two vacuum lines that come out of the adjuster.

Have fun!
Pat☺

 

Thanks. My A/C doesn't work, so I will leave it alone.