I got the idling problem too on 4G93T, the RPM going up and down from range of 1k to 2k, below is the troubleshooting steps the workshop done on my car...
1. Check ISC - still same problem
2. Check Trottle body - still same problem
3. Take off BOV n put back the ori - still same problem
4. Check Air Flow Sensor - still same problem
5. Lastly Check ECU - change another ECU n problem solved. So is the ECU koyak edi.
Hope this will helps.
1. Check ISC - still same problem
2. Check Trottle body - still same problem
3. Take off BOV n put back the ori - still same problem
4. Check Air Flow Sensor - still same problem
5. Lastly Check ECU - change another ECU n problem solved. So is the ECU koyak edi.
Hope this will helps.