The idle adjust screw is on the throttle body. The side of the throttle body that faces the front of the car should have a dime size flathead screw towards the upper edge.
there is an Allen screw and a nut on the throttle cable you loosen the nut and the screw and adjust it to make it idle up or down.
There's an adjustment nut on the hand grip for the throttle cable. Back it out to make the throttle tighter, and screw it in for looser.
There is an adjustment screw on the side of the throttle body that adjusts how open the throttle body sits.
Adjust the throttle stop screw located on the side of the carb that has your throttle linkage connected to it.
There should be an idle screw right by or under your throttle
by the set screw on throttle cable
Underneath the carbs, near the throttle on the right side of the engine.
there is a adjustment screw where the throttle cable attaches to the EFI throttle body.
Just above the throttle cable linkage assy., on the intake manifold, there is a large flat screw for a regular screw driver bit. Turning this will adjust the idle.
"84 is still the carb. There is a small screw right at the throttle cable on the carb. Adjust that.
Fuel mixture can not be adjusted it is computer controled.You can adjust the idle by removing the cover where throttle cable attaches to the throttle body and turning adjustment screw