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NzBrakelathes
Have a look at my post No11
I have clean, set Throttle body butterfly valve, restart ECU and this didn't help.
4 photos of PCHUD shows what you asking for.
Stepper motor is around 30/35 steps when Idling
Voltage is 14.4 when all switched off, after switching all ON is dropping to about 12.4V and if closed loop is not active engine is keeping up with this load, when Idling.
Only what I have find out it was that when Closed loop activated engine playing up when under Power load.
Maybe one of the sensor is not sending the correct informations to ECU
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