All sensors apart from the tps and iscv is new. Just fitted after a head rebuild.
The iscv is not sticking when pushing it carefull with at screwdriver (holding it in my hand).. the piston can move very easy. But the condisitions inside the throttlebody may be different afcause.
The tps work according to my multimeter.. 42-48ohm closed to 630 ohm fully open, with NO glitches
Was it ok before the head work??? Did you remove the sensor or are they in the same position as they were before the head work???
If the ECU sends a duty cycle to the ICSV to open then it will (either a faulty signal or a load on the engine), it could be down to another sensor giving incorrect information to the Ecu.
I'd suspect the TPS.
Measure the pins at the ecu with the TPS multiplug still connected, pins 11 and 17, 0.25 to 0.3 volts DC.
Have you done a error test to ensure all sensors are ok?
But... CAN the ISCV cause idle in the range of 12-1500 r/min?
Yes it can, ive seen idle above 1500rpm all down to the ICSV.