White smoke exhaust but none on idle

Hi Kevin,

This isn't specific to your van, but in general white smoke usually indicates a coolant leak into the engine. While there can be several possible sources for that leak, the most common one is a blown head gasket.

Crank the engine over a few times with the coil wire removed so it doesn't start then check the spark plugs. You're looking for one that's wet but not with gas, with coolant.

Do a compression test and make sure all of the cylinders have the right compression.

Finally do a block check where you bubble gasses from the radiator through a chemical to check for the presence of hydrocarbons in the radiator, which indicates that there's a leak between the cylinder and the water jacket; i.e., a blown head gasket.

Go through those diagnostic steps then come back and tell us what you found.