3.5L choking at idle
My 3.5 since I bought it has been vibrating as the RPM needle momentarily goes below the IDLE RPM when the car is stopped. It is a 2007 and I've been using 89 gas since I've bought it.
I finally took it for servicing when the car slightly and briefly accelerated on its own when stopped (this has happened a few times since). The service guys said they found no evidence since the two fail safes had not been activated which are there to prevent the car from accelerating on its own.
Any idea on what the choking could be? It happens a few times per week, probably 1-2 times per drive.