Hi gang,
I’m experiencing the same as mentioned on another thread.
Rough idle, almost stall on startup, stalling on deceleration. If I touch the accelerator when started, erratic idle- high revs. Seems to drive normally despite the idle trouble.

I have replaced the following:

Valve adjustment
OEM map sensor
PCV valve
OEM Surge tank sensor
Air & fuel filters
Temp sensor (big one on thermostat housing)
OEM O2 sensor
NGK plugs

Good fuel flow & 40psi
Crank sensor checked, (even though engine starts)
Throttle body cleaned.
Injectors checked.

No change in symptoms as yet.
Usual vibration when thermostat fan or a/c runs with no effect on idle.

Awaiting new OEM throttle body and OEM VDO spark plug leads, hoping the new throttle body rectifies the issue, update when fitted.

Update

Have replaced throttle body with a brand new one from proton, and no change to the issue.

Also installed some 8mm NGK leads and a new denso fuel pressure regulator.

It’s truely got me stumped. I might have to try a new mechanic, I’ve found one that does a lot of newer model Mitsubishi mods/servicing, get the coil checked and the intake manifold for vacuum leak. Hopefully they have the diagnostic equipment needed..