Bad idle, white smoke??

[peterbuilt]

Ok heres the story kids. I started getting a random misfire code about a week ago, and the other day it over heated on me.

So I replaced the plugs and i did a radiator and block flush as well as the therm.

But now when i crank it it won't stay cranked it back fires and puts out alot of white smoke. So i am guessing egr or head gasket issues. What do you guys think?

[P-Funk!]

Yep - sounds like the head to me...

[8ender]

Sounds like a head gasket. Do a compression test to be sure.

[P-Funk!]

Oh noes! i just noticed today white vapor and excessive water out the tail pipe & a rough idle. The car was def'ly warmed up.

Dang!

[P-Funk!]

^'Whew'! The combination of low temp and very high humidty made it appear i had problem - but every car had it....

aaaahhhhh.