Originally Posted by PoManzAWD
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. Programming deficiency.
My statement has nothing to do with the iac system, but the bypass valve. Bypass valve rpm bounce. This same thing occurred in my wrx and was able to fix with a blow off valve which closed much quicker than the oem bypass valve.