[besidetheseaside]

So after my dismal failure trying to cure my cold start issues, now cured by the warm weather, the car has now decided to tickover @1500rpm when it is warm and too high when cool. I backed off the adjuster screw but it made no difference. Throttle butterfly is where it should be and TPS clicks when it should do. If I clamp the IAC hose the engine stops. I believe the ECU controls the tickover it is not actually mechanical, is that correct ??
Any pointers and tips will be gratefully received as always !!