Join Date: Apr 2012
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Slow crank / Rough start up idle
So with the cold season here my truck has been experiencing some new symptoms on startup. I haven't been plugging it in yet just because our temperatures have stayed 30-40 degrees.
On startup after sitting for the night the crank is very slow, probably 1 second per crank. It takes about 7-10 seconds of cranking to start up at times(my buddies 06 6.0 has sounds like it has 5cranks/second). After I drive it for a little and try to start it up immediately after the hard start symptom usually goes away except the crank is still 1sec/crank. The battery has died acouple times while trying to crank it when cold.
On the initial slow crank startup the truck will blow white smoke briefly (3 seconds?) and idle very funky/rough. The engine's loud 6.0 knock isn't prominent until about 20 seconds of sitting.
Batteries replaced (at different times in a year)
New alternator (3rd one in a year)
Had new gaskets/egr delete, etc serviced 6 months ago
Glow plug harnesses were changed