Hi folks, I am new here... My wifes car is acting weird! It sputters, shakes ect at idle, on cruise, coming 2 a stop and accelerating, BUT, not all the time! It will act up on her way 2 work but drive just fine on her way home. It will go 2 or 3 days with no issue then out of the blue act up! I am at a loss on this issue, I have had a complete tuneup done on it thinking that was the issue but it still does it... It is a V6, auto trans... Any advice would be great, thanks...