Where is the idle air control IAC valve located?
Locating the Idle Air Control Valve
The IACV is usually located on the intake manifold near the back of the throttle body. via
How does the idle air control valve work? (video)
What RPM should my Ford Ranger idle at?
At idle the RPM's vary from around 700 to 1500/2000...and the engine will die occasionally. via
What can I use to clean IAC? (video)
Can IAC cause hesitation?
Your IAC Valve May Be To Blame. You press down on your gas pedal and expect your car to take off smoothly, but that may not always happen. You might be experiencing hesitation due to a bad IAC valve (or idle air control valve). via
How do you clean the throttle body on a 2003 Ford Ranger 2.3 L? (video)
What is the throttle body? (video)
Why does my engine rev up and down when in park?
The idle is controlled by the idle air control valve and if it cannot keep the engine idling it will keep trying to rev the engine up to compensate. A vacuum leak, sensor that has failed, or an EGR system malfunction could potentially be the cause of the erratic engine you're experiencing. via
What RPM should I idle my semi truck?
Idle the engine at 900 RPM to 1200 RPM.
This ensures the oil has sufficient pressure to reach the top of the heads in the engine. via