ease off the throttle. change up a gear
Adjust your idle.
diagram of rpm in trooper
change the TPS Throttle Position Sensor
Have some one professional adjust your TPS (throttle position sensor)
You can't. Its computer controlled
It is normal for the RPM to increase a little when put in park or neutral. If the RPM increases by a lot, then you need to adjust your idle speed.
If it has the standard 2bbl carb, there is a screw on the drivers side linkage. Just turn in to increase the rpm's, and back out to decrease. There is also a choke "kick-down" screw that can affect engine rpm when cold. This one will be screwed into a "stepped" cam on the linkage. You will need to adjust this for high idle speed when engine is cold. You may also have a high idle speed solenoid mounted on the front of the carb. This increases engine rpm when the ac unit is swithced on. This should be adjusted from the factory, but can be tuned by by a screw on the front of the solenoid.
Idle speed is set by the PCM and IS NOT ADJUSTABLE.
You need to either adjust your carburetor richer or leaner while at full throttle.
MANUAL ADJUSTMENT IS NOT AVAILABLE and why would you want to adjust the rpm?? Yes, look online for an aftermarket computer programmer for your truck. Like Hypertech, for example. It will adjust by rpms, more than likely.
rev limiter will only let the RPM's get so high then it cuts back
the idle is controlled by the computer should be about 700 rpm's