Hi Mr. Diederik Hagen,
I am from Indonesia and I'm glad to hear that you have experience training teachers and students in Indonesia. I recently bought a Toyota 7K-E, which is known here as the Toyota Kijang Krista EFI 1.800 cc year 2000. I'm experiencing a problem with idling where the RPM goes up to 2000 and then drops, revs up to 2000 again, then drops, and so on. This doesn't always happen, but it's usually triggered after a long run (like on a highway or climbing a hilly road). Sometimes it occurs just when I warm up the car. I've replaced the ISC actuator/valve twice, but the problem persists, so now I have three ISC actuators.
Do you have any thoughts on this issue? Many thanks in advance.
Cheers,