Alternator
Laughing Gas
Joined: May 2017
Posts: 969
Likes: 30
Originally Posted by troverman
Aside from tremendous electric usage at startup, a diesel likely takes less to stay running since it is not operating an ignition system. Combine that with the fact that it has dual batteries...I'd guess a 6.7L would stay running on battery alone than a 6.2L pickup.
The climate control and heated / cooled seats can also be completely shut off.
The climate control and heated / cooled seats can also be completely shut off.
Hotshot
Joined: Apr 2013
Posts: 10,119
Likes: 652
From: NH
The injectors on the 6.7L are piezo-stack. The stack moves a tiny valve which uses pre-primed hydraulic pressure in the injector to open a larger assembly which allows the main fuel charge in (up to 7 times per cylinder per firing). The piezo stack uses less electricity than a standard gasoline port fuel injector.
And if you had two large, fully-charged batteries when the alternator quit...yep...I'd still place my bets on the 6.7L staying running a lot longer than an equivalent 6.2L gas V8 truck.
But you are right, eventually the batteries will die and the truck will strand you. I just think the diesel could stay running longer.
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Mountain Pass
Joined: Apr 2009
Posts: 137
Likes: 1
Yes the motor will run for a long time ...but the transmission will start to shut down. Had it happen where it wouldnt shift down and was starting off in 4th gear from a stop and drive to reverse was acting up as well as getting it into park
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