Had an issue with the idle surging after a cold start up. Looking through the forum I found a resolution buried in a thread so thought I would post a quick knowledge base type post. Credit to all who post on here but mostly Sprocket for odd specifics about injection minis...
ISSUE: At cold start, idle would settle at 1000 then increase decrease up to 1500 and return to 1000. Eventually causing the engine to struggle and nearly stall. No modifications to idle screws, throttle etc. Was working one day then just stopped the next
CAUSE: Stepper motor should control idle while cold to increase idle speed but was not in this case. Surging related to CPU adjusting advance.
SOLUTION: With the accessories on without motor running, from the throttle body, fully actuate throttle linkage from closed to fully open 5 times. (In my case) It caused the stepper motor to reset, audible clicks heard similar to what it should do after engine shut down. Started the engine and issue resolved