Hi guys,

Ive been scratching my head over this for a while and can't seem to figure it out.
Symptoms:

- ISC plugged in - High Idle (Sits around the 2300RPM)
- Unplug ISC - Drops to 500rpm
- ISC Plugged in - Turn on Aircon (Drops to 1200RPM) (If anything I thought it would have gone higher?)
- Unplug ISC with aircon - Drops to 500rpm


I've replaced the ISC with a known working one and checked for vac leaks.

Reason why I want to use the ISC as mornings are a pain, (it being manual) and using aircon and going around corners is dangerous.

EB Fairmont | Manual | BBM Manifold - Does it on gas and petrol.

Any help much appreciated,

Cheers,
Ash

I have my ISC permanetly unplugged. And have the idle screw adjusted so it idles at 750. 100% better drivability, 100% better overall, no rev hang, no fluctuating idle etc.

Only downfall is on first startup in the morning i have to hold my foot on the throttle at 750 for 15-20secs. Then she behaves herself. But for a one off thing (only in the morning) its well worth it. Plus doesnt bother me because i wait until i have full oil pressure and let it warm up for a few mins before going anywhere.