Blue/ white smoke ISX15

[Rawze]

NOT doing a thorough EGR-tune-up on it every year = Noting but DPF and other emissions system problems. It is simple as that.
ref: http://rawze.com/forums/showthread.php?tid=7&pid=9#pid9


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and as far as the smoke is concerned...


Is it only when it starts going up a hill.. and it blasts all out real heavy for a bit, and then goes away?.
ie. (Doser injector needs cleaned/replacing. and/or .Not igniting the fuel properly during passive regen cycles).

or...

is it only when it first cranks up and then fades out as engine the warms up?.
ie. (Valve guide seal issues).

or...

is it all the time?.. somewhat light?... heavier when you get on it?.
ie. (Broken piston ring or excessive cylinder wear from sitting and rusting up internally. and/or. form oil starvation or abuse of some kind).

or ... something else?.