If I can't get it plugged in for some reason, and temps below 15F or so...I shut down all power hogs like the fan, the radio, the headlights...and cycle the ignition two or three times at least, waiting for the WTS to go off each time. The GPR is really still active, but I figure it's providing some more heat into the fuel bowl and into those frozen 15-year-old stock injectors and the 3-year-old batteries thank me.
Does it really make a diff? I dunno, but I feel better for thinking so
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I think it makes a diff.
I usta do that on my 7.3.. cycle it 2-3 times.. with everything off.. he'd fire right up.
Don't know what the diff is with the 6.7 but so far.. I'm not sure it needs to be plugged in with the temps around Cen Cal. Temps in the low 20's.. it fires right up. No Block Heater.
Joe