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Usually, for a cold start, I just wait for a couple of minutes for that voltage to come back up to 12+ before cranking. The reason for cycling the key twice was to prime the fuel also since I was parked facing uphill. Most of the time, I park on the curb where it is more level. I may be wrong, but that's how I have always started my diesels (7.3 & 6.0)
We don't get these "very" cold spells here in NoVA often. And this is my first winter with the 6.0. If there's a lot of snow on the roads and the temps are below freezing, I generally just stay home This was the first time I've started this EX in below freezing temps. I've used the block heater once in the last 8 years of Diesel truck ownership and that was also an experiment with my 7.3 to see if that made a big difference. I have been grateful that the trucks have been starting normally. They both gave me trouble in other ways though
Block heater helps get the heater hotter faster too.
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.