I cranked last winter but this winter I have done the following.. Turn key, wait for glow relays to turn off, turn off key for 10 seconds, turn on again, wait for glow plug relays to turn off, turn off key again for 10 seconde etc etc.. Maybe one cycle for every 3 deg below zero. It was only -9 here this morning (Balmy sunny sothern Ontario) but she fired up fine after 4 of these on/off cycles. If you just turn from on to acc and back again the glow plug relays only click over for one or 2 seconds. You have to right back to off to get another 7 second glow cycle. Either the controll circuit resets with an off on the key or the 10 seconds with the key off allows some heat from the plug to sink to the heads. I am assuming it is the latter as the start up is much smoother than a crank only start.