When in a race, I can turn my steering wheel, and it will turn in the game as well, but whatever I do, the pedals won't work. I've set the controls to "Configuration 3", which sets acceleration to the right control stick, but still the pedals don't work. I could go with "Configuration 1/2" but then I have to accelerate with R2, and it's on top of the steering wheel.
I only experience this with NFS Shift. It does work fine in GT5 Prologue and Dirt 2.
I've been looking everywhere, and I can't find the answer. I think I'm doing something pretty dumb :S
Btw, when I was driving with the R2 setting (really unplayable with steering wheel that way), the force feedback wasn't enabled. It did nothing, but there is no option in the controls menu? I own the PC version as well, and you can set the configuration to Driving Force Pro, and everything's fine. But the PS3 only has Configuration 1, 2 and 3 which is for the normal controller. Yes, the power adapter is plugged in.
Pretty weird if you ask me.