White smoke on decel

[BigDiesel]

I just noticed that when I let off the throttle on my 91 7.3, that it blows white smoke out the exh pipe at rpms over 2000 rpms. I am running wmo, and it runs good on it. The smoke quits after about 5 seconds of decel. What could the problem be? Thanks.

 

[Agnem]

Is it white, or blue? Get your timing checked and set if needed. If your not smelling coolant, then not to worry.

 

[BigDiesel]

At idle all I smell is oil burning out the tail pipe. The timing is set by my ear, and the pump is turned all the way to contacting the coolant hose on the pass side. It only rattles when cold on diesel, but when on oil it runs smooth with very little rattle.