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A major throttle hesitation has developed in this car,that is so bad,sometimes when you put the pedal to the floor it doesnt want to accelerate at all. Feels like the car has a bout 25% power,it seems to shift very weird also,its like the car is trying to keep the rpms very low. Im not positive but it seems to occur mostly when the car is first started and still cold,or on very wet or humid days?it feels like the car is activating the traction control and the throttle plate is not opening all the way at wot?
Sounds almost like a throttle position sensor issue to me. I had something similar with my SC400 a while back. You check the fuel filter? Long stretch, but it very well could be something with the fuel delivery, and the filter is a good place to start with that. Best of luck. Keep us posted.