Mitsubishi cheetah turns off the engine as soon as it turns on the air conditioner.

1. Check whether the idle steps are too high, so that the idle motor cannot be adjusted. Just changing the motor and cleaning can't achieve the correct effect, so the idling steps need to be adjusted. The cheetah's throttle has an idle air conditioning screw. Increase the idle speed, and then check the speed, water temperature, AC switch, throttle idle switch, throttle position sensor voltage value, steering switch and idle motor steps in the data stream. These idle related data streams,

The first water temperature should be between 82-90℃, the voltage of the throttle position sensor should be between 640-680 mA, the idle switch should be turned on, the battery voltage should be normal before operation, the air conditioner must be turned off, the lights must be turned off, the steering can't be moved, the idle screw should be adjusted between 1500-2000 rpm, and then it will slowly drop according to the steps of the idle motor. The standard is 5-7 steps. Wait for about 5 steps to adjust the idle screw back to 750 50 rpm (based on the speed of data flow) so that sometimes it will not turn off. Experienced technicians are needed to do this. If there are other abnormalities in idle speed, you can analyze the possibility of other faults by looking at the data flow above.

Second, you didn't mention the number of cheetah tanks. If the engine of 4G64 is ignited by a distributor, check whether the groove at the connection between the distributor and the camshaft is too worn, leading to the failure caused by incorrect idle ignition time (less likely).

Third, check whether the water-cooled idle valve is too dirty (whether it is installed correctly), and whether the air inlet passage of the idle motor and the air inlet passage of the adjusting screw are too dirty.