Originally Posted by Big11beard
The oil and coolent levels look the same as before the 45min drive home. I would think the coolent level would be significantly lower if it was leaking through the combustion chamber. Also the engine temp stayed steady at 2/3 of temp gage range. I did notice the oil pressure fall maybe 10lbs or more when the smoke starts. That may just be the simalar affect of removing your foot from the throttle. I leaning back towards a fuel delivery problem.
It does sound like a injector problem, those engines are know for blowing the tips off the injectors, but they are know to break piston rings, and blow head gaskets.
if it was me, I would start by removing the injectors, you can have them tested, the oil seals go bad and cause blow by. when there out you can do a compression test as well. I had lots of smoke and it was light blue/white, I replaced all 8 injectors, all is good.
but you really should take it to a shop if your not sure, its costly to replace them and its not the problem.