No,the timing is fixed by the ecu and cant be changed.
Adjust the idle screw. Get a Haynes manual or search for an underbonnet diagram. While the car is running, slowly turn the idle screw [with a screwdriver] until it's at the RPM you want.
750-850 non adjustable
diagram of rpm in trooper
If by tick over you mean when should you shift, then it depends on how much torque your engine is producing. You will discover as you drive that shifting between 5000 and 6000 rpm assures maximum torque from the engine. Mazda does recommend reving the engine near redline (approx. 8500 rpm) several times a week to eliminate possible carbon buildup. I personally love the feeling of shifting at approximately 6500 rpm to keep it in a lively range. Remember rotaries love to rev, and reving it high (above 7000 rpm) is actually good for the overall health of the engine.
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.
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.
Adjust your idle.
ease off the throttle. change up a gear
Idle speed is set by the PCM and IS NOT ADJUSTABLE.
the idle is controlled by the computer should be about 700 rpm's
You need to adjust the RPM in order to stabilize acceleration in your Vulcan.