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Reading through the fsm but unable to find out how the PCM detects or determines the bottom (fully seated/count 0) pintle travel during key off reset. Supposedly the PCM cannot "see" pintle movement but instead relies on the precision of the stepper motor to do it's thing and move correctly with each command after each reset. GM has an IAC testing tool that may or may not help but looks expensive. Hope you get it figured out and get some more footage up soon.
Are you still happy with your Link ecu? If you were to do it again now, would you go with another system?
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