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2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Hi again.
The idle stop solenoid is not strong enough to push the throttle linkage by itself.
Blip the throttle so the solenoid can fully extend then adjust the idle.
When you turn the car OFF the solenoid will retract and the throttle linkage will now rest on the 'idle screw'.
The purpose of the 'idle stop solenoid' is the let the throttle plates close 100% and prevent diesel run on.