Mitsubishi Airtrek Turbo Stalling Fixed - Stepper Motor/ISV/ICV - Idle Control Valve

Description

Finally the problem turned out to be what I thought it was in the first place - the stepper motor or idle control valve on the throttle body. The existing one was already worn out (visibly so) but the original mechanic said it was ok. Swapped it with a known working one and the problem went away. If you want to test your stepper, start your car without anything else on (aircon/lights) and leave it in N, if you turn the steering wheel side to side the rpm should go up, if it doesn't your stepper is most likely broken. It can also cause the car being hard to start in the morning (as seen in the previous video) as when you turn the car off the night before the stepper motor won't reset back to the original step it'll get stuck at the step it was on when you turned the car off (the wrong one). If your stepper motor is dead or not-functioning properly you'll face a lot of stalls, especially when the aircon is on and you engage reverse gear. I also found out in this process the Air Flow Sensor was dead, which was causing the jerking, so everything seems to be solved now! Plus the Greddy Type-RS diaphragm had worn out so it was leaking (even at idle!) which contributed to the problem. Switched back the OEM one for now until I have money to buy a new one.

Keywords

airtrek, stall, stalling, 4g63t stalling, car stalling, mitsubishi stalling, airtrek turbo, mitsubishi airtrek turbo, isv, icv, stepper motor, idle control valve

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