I have a 98 C5 with 6speed I've been noticing a lack of power from time to time & even more recently . I took the air boot off & had a buddy work the accelerator pedal from idle position to full throttle (engine off)& the throttle on the motor never did reach full throttle .And with the accelerator pedal @ full throttle it never did go to the same position it was different every time any where from 1/4 to 3/4 but never full throttle position . I took the accelerator pedal out of the car & used an digital meter on it seems to be ok ??? Any help would be great .