Originally Posted by wrxwhit
Could be caused by the bypass valve not shutting quick enough under vacuum causing rpms to jump when you change out of gears to neutral when driving.
There is no idle air control system on electronic throttle controlled engines.
E-throttles move the throttle plate themselves to maintain idle speed.
FWIW, there's about 3 recent threads on this idle stumble deal for 2010+ 2.5i CVTs. It's a programming deficiency that I'm sure SOA will drag their feet on fixing for everyone.