Idle Speed Controller - Stepper Motor - Idle Air Control Valve CU2W Airtrek 2.0 Turbo-R 4WD If your engine idling is going up and down like a fiddlers elbow then this could well be the reason.
Genuine Mitsubishi Part - Special Order from Japan approx 3-4 weeks For an Exploded Diagram of inlet manifold and Throttle body Click HERE Mitsubishi Part Numbers MD628166 MD628318 1450A069