2006 Ford Mustang V6 Premium 2dr Coupe (4.0L 6cyl 5M)
I believe it is NOT normal.There is a surge in the RPMs in neutral…up to 2500 at times. This problem is intermittent. According to the engineer, this is the way the car is supposed to drive if the car is not downshifted, and also that it could be that I am not pushing the clutch in all the way. I have had this problem occur even in the absence of these supposed precipitating factors. I have had my Mustang in for service numerous times over the past year. The problem started a month after I bought the car. If it is normal, why didn't it do it when I first bought the car?
I have also gone online to research this problem, and have found other people who have the same problem and who also do not feel that this problem is normal. It is my assertion that Ford Corporation is aware of this problem, but that it would be a huge cost to fix or recall all of the Mustangs.
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