Update
Monday 7th April
Still no luck getting the car running smoothly.
When warm and driving along theres no real problem
However, on tick over and startup its running bloody awful. Stepper motor was diagnosed as knackered and it couldnt be moved by hand, so its been replaced with a new part.
Still the problem is the same. Eventually all of the loom wiring was checked for signals from the ECU and there was none coming from the ECU to the stepper motor atall rendering it inactive
After more indept inspection its become apparent that there is NO PIN from the ECU going into the loom and therefore providing the necessary signals to enable the stepper motor to work and regulate the idle speed.
So i need to call GMC today and find out if theyve actually sent me the wrong ECU for the car, or whether its faulty.
Considering the KMS was supposed to be the easiest/most plug and play option available this is not a good start with nothing but problems.
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