07 Mazda 3 Stuttering
Mazda 3 07 Dieeel.
Mazda 3 07 Diesel stuttering while I'm driving at 50/60km per hour in 4th gear. Drop to 3rd and it seems to settle. Also while I was driving at 100km per hour one day it gave out a single burst of white smoke. This happened again a few days later when starting the car. I have had the chamsaft sensor water pump and Timing belt all done recently ... Any ideas on what it could be ??