IAC-minimum opening
IAC minimum opening. Minimum IAC valve position allowed. Helps stop engine stalling.
Cranking ignition
Cranking ignition timing.
Ignition timing during initial RPM when starting.
Crank ignition timing can have modifiers under "M2,Ignition trims".
Idle ignition
Idle ignition timing while throttle position is less than 1%.
Can be setup on engines without idle control valves to maintain idle speed when A/C or
transmission is engaged.
Example:-
Required idle RPM = 800
Engine speed(Rpm)
750 800 2000 3000
IGN Deg 30 10 10 30
If while the engine is idling at 800 RPM the A/C was switched on, the engine RPM would
drop only slightly as the additional timing at 750 RPM would stop RPM dropping.
The additional timing at 3000 RPM will help the engine to smoothly return to idle.
When setup as Idle ign delta RPM, the x axis is the idle error. -ve means idle is too fast,
+ve means idle speed is too slow.
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