Discussion in '6.0L PowerStroke Engine & Drivetrain' started by tmuller, May 4, 2017.
Mine does the same thing when it's really cold I would like to figure it out as well.
Of you are running 15-W40 oil try changing to to 5-W40. Stopped my surging.
I have been running 5w30 Amsoil diesel oil now for nearly 2 years in all weather. I can't imaging it's the oil.
I'm down to 2 things.
1) it's a sensor that is not working correctly when the truck is warming in the morning during glow plugs running
2) due to glow plugs running, there isn't a correct voltage detected by the VR on the alternator (one I am not monitoring) and the truck thinks it needs to charge / not / charge / not / etc.
Next step, going to run a tap to the wire on the alternator directly to battery voltage and bypass the computer to see if there is something there BEFORE I go off and start replacing sensors.
What year of truck do you have? Add this to your signature so we won't have to ask.
06 F350 Crew Cab. Again, this only started after putting in the new alternator.
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