Ok so looking for some advice n wisdom from someone with a little more experience on adjusting the idle on my 86 fc n/a. When i bought my car someone had tweaked with all the idle adjustments n I've been messing with them since figuring out what does what n trying to het it all correct I've been playing with the throttle position sensor adjustment and the air adjustments on the top of the intake and the pressure sensor adjustment to lean and richen it out. I appreciate any help n knowledge...

 

In order to adjust the idle you want to make sure there is no vacuum leaks and do a tune up (spark plugs NGK, fuel filter, oil etc.)

Where and how does it idle right now?

 

The car you have has an idle adjustment near the Pressure Sensor but it is not a Pressure Sensor. The idle device is basically set to more rich than lean but it's also not to be messed w/after it was set at the factory. If you need to adjust it look in the Emmision Control section of the service manual and it will tell you how to properly adjust it in addition to checking the other items related to idling. And this item is called the Variable Resistor.

The TPS has a Green/Red wire. W/key to on and the engine as hot as it can possibly get ( 20 minute drive) this wire should read 1 volt. There is a one inch flat head screw encased in a spring right near the TPS that is used to adjust it if need be.

There is also a screw on top of the engine where it says 13B and this is an idle adjust screw. To play w/this the Initial Set Coupler needs to be bridged where both wires in this plug are to jumpered to each other. The check connector plug is near the lead coil and it's the only plug w/just two wires.

Lastly, the advanced search function will provide you w/everything you need to know about setting your idle. And when making such posts you need to provide more info detailing exactly how your car is behaving.