I have a 2011 SES with a manual transmission. I previously drove a 2000 VW Beetle (not the turbo version), also manual. That's the car I learned stick shift on.
I tend to drive the car a little hard, so I'm used to making the mistake of holding down the gas as I disengage the clutch (push the pedal down). This tends to have the effect of blipping the throttle (revs) higher. I would make this mistake sometimes on the Beetle, and I would hear the engine rev higher. I have also made the same mistake on the Fiesta. What I'm saying is, I know what this sounds like. This is not the same problem I'm about to describe.
A similar sound and throttle blip occur when I disengage the clutch without leaving my foot on the accelerator. I will be shifting from second to third (for example) in the Fiesta, so I will take my foot off the gas and disengage the clutch. Instead of slowing down, the engine will continue to spin at the same speed it has been spinning and sometimes even speed up for 1-2 seconds before finally slowing down. This creates a subtle jolt in the car if I put it back in gear before the engine has slowed down to the appropriate speed for the next gear.
Why does the engine have so much momentum and not slow down right away? And why in the world would it speed up after I disengage the clutch and let off the accelerator? Is there still fuel being pumped into the engine just after I let off the accelerator? Or is the engine just very different from the Beetle's and I just need to get over it and get used to it?
I haven't gotten it checked out by the dealer yet, because I might just be crazy. I mentioned it to my sales rep and he muttered something about the car having a different flywheel to help the PowerShift transmission make its shifts smooth, and that the same part made it into the manual. Is he correct? Can someone describe what he means?
Anyway, I could just be imagining problems, but thanks for reading!