I believe it is located on the lower passenger side of the throttle body.
The idle air control valve is located on the throttle body, and the EGR valve is located on the intake manifold.
It should be attached to the base of the throttle body.
The 1991 Acura Integra idle air control valve can be found on the firewall. The valve will be on the drivers side of the firewall.
On the right side valve cover.
The idle air control valve is located next to the throttle body. It is connected to the air cleaner hose on the top of the engine.
The air control valve on a 1991 4.3 S10 is on the engine. Kindly refer to your usual manual to see the exact point, where it is located. The Idle Air Control is attached to the base of the throttle body.
the PCV valve is located on the valve cover of a 1991 Regal Custom. It is plugged in and can be easily changed.
Pass side valve cover.
The PVC valve for a 1991 Skylark should be located on the top of the valve cover. It is a plug in type, twist and pull to remove.
Check Related Link below. It shows you a picture too.
You need to replace your IAC Valve (Idle Air Control Valve) It's located in the back of Your Intake Manifold.
IAC - in other words idle air control valve