The idle speed is computer controlled. You need to scan the pcm for faults, read it sensor data, and decipher why the idle is incorrect to repair.
when the engine starts and is warming up the idle is supposed to be at around 1500 rpm but when the engine warms up the idle should drop to between 700 and 1000 rpm. if it doesnt drop then see a mechanic because it is a very complicated fix
The idle is automatic. If the speed is not corect then you have to fix the problem with the idle motor.
fix the leak
Buy a new clutch
Buy a new truck
the speed sensor.
it is not expensive and if you have a workshop manuel, it is an easy job
I Think you should go to a mechanic
You can't adjust it, you have to replace either the IAC ( idle air control ) sensor or the TPS ( throttle position sensor ) to fix a bad idle.
2001 dodge ram 1500 ac and heater flow regulator switch does not work. works only on defrost. How to fix?
to fix it drive to the dealer and trade it for a cummins so then you wont have that problem.
1200 to 1600