I have an 05 g35 coupe it will start but will not accelerate what so ever in park or in any gear. We have changed everything we could think of and did all the resets and still wont accelerate. Any ideas of what the problem could be?

 

Plug in an OBD2 scanner that shows sensor data and see if the accelerator pedal position (APP) is actually increasing. This is throttle-by-wire and your pedal switch might have died.