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I have an 05 F350 6.0l and it is running slugish when its cold but runs fine once the engine gets up to operating tempature. Any ideals what it could be.
injector stiction.this is when the injectors have a varnish build up on the fuel or oil side,more likeley on the oil side of the injector,that causes them not not function as they should until the temp in the oil gets up to almost160 degrees and they function fine.try plugging it in and see if it helps.
you can have the ecm reflashed and see if that helps.
by replacing the injectors if its bad enugh.
you can try to change the oil with 5-40 and see if that helps.
