van shakes,there's white exhaust and smoke

The shaking on start up could be due to a misfire caused by poor fuel atomization or ignition incapable of supplying adequate spark. Is your car loosing coolant another possibility is a mildly blown head gasket causing coolant to seep into the cylinder over night and cause rough running on start up.

u need to change spark plugs and wires

head gasket is shot -burning antifreeze..