So I just finishedfixing a blown head gasket. Got the heads rebuilt and put everything back together. Mytruck started up just fine but is idling pretty rough. Found a few vacuum lines that needed replacing, check the spark plugs and wires and new coil. There is a good bit of water and white smoke coming out of the exhaust and the manifolds. Any suggestions to what causes this and what I could check for the rough idle? Thanks

 

white smoke out the exhaust is water/coolant in the combustion or exhaust system

did you verify timing is correct?

 

Year and engine, please?