Kausi

I have g55 which hestitates stumbls when engine cold. Basically you have to be very carfull with accelaration otherwise it almost stops. When warm problem goes partly away. No fault codes in computer. Dealer thinks it is throttle body failure. Any other opinions?

The Butcher

Could be throttle body (expensive), or just the sensor (cheap). My mechanic thought it was the throttle body and $1,200 later figured out it was the sensor. Can't recall if it was the air intake sensor, or what, but check that first as it would be the much cheaper fix.