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Old 01-13-2018, 08:56 AM   #5
Elbert Bass
Scooby Specialist
 
Member#: 283429
Join Date: May 2011
Chapter/Region: South East
Location: Down yonder.
Vehicle:
2016 Fuji Sunfire 03
Silver

Default

As mentioned yes, your model has "drive by wire" The throttle body is controlled electrically by the ECM. Idle is managed by opening the throttle. As the throttle plate builds up deposits from the crankcase breather system the ECM compensates by opening the throttle a little more and memorizing that as a base setting for initial idle.

When a battery is disconnected or replaced (or engine code memory is cleared) this memorized value is lost. When the throttle is very dirty there can be instances the idle does not relearn. This is why cleaning the throttle body (most shops perform an induction cleaning service) should be performed. We perform them at every 30,000 miles and that seems to keep the throttle clean enough to avoid issues like you have.

Assuming you have not left any of the vacuum hoses loose you just need a throttle body cleaning and clear the ECM memory (disconnect the battery). Unlike earlier models your 2012 FB2.0 will not need to sit and idle to relearn beyond a couple minutes.
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