Originally Posted by Kuhlrover

White smoke: Unburnt fuel. This can be caused by low compression, bad timing or low combustion temperature. For low compression or low combustion temperature, this is usually worse when the engine is cold or was just started. Other things are bad injectors (spitting instead of spraying) or a worn injection pump.

Billowing white smoke: most likely coolant leaking into combustion chamber. Should smell sweet or like hot antifreeze.

Blueish white smoke: Burning engine oil.

Black smoke: Too much fuel or not enough air: This can be caused by a clogged air filter, timing, IP out of adjustment.

I also noticed you are in Co. The higher elevation is going to augment some problems. Since the air is thinner, there is less air to compress in the cylinders and therefore it will drop the combustion temperature. If your engine has significant wear, the higher elevation will make this more pronounced.

TimK