Lifetime Supporting Member
Join Date: May 2002
Location: Gypsum, Co
Feedback Score: 1 reviews
When you turn the key on the PCM gets it's information from the EOT (engine oil temperature) and the barometric sensor to send a ground to the glow plug relay which will turn it on. Then the PCM also controls the delay as to when to remove the ground to turn them off.
Unless you have a California model you won't get a CEL.
Even if where you live at 6000' you should be able to start your truck well below zero with just the glow plugs. I live at 6500' and never have had to plug in my truck to get it stated. It will argue with me when it gets below a -20 but it will start. Even at a 11,000' in the winter after sitting for a extended time at below zero I have no problems
96 F250 PS XLT 4X4 long box, 5sp,4.10, manual hubs,pyro+boost guages, Dark Toumaline, add a leaf, Dale's TYMAR, and HX hose, downpipe, coolant filter, Luk clutch