white smoke at highway speeds...only after 30-40 miles

toby2tongues

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zanesville ohio
I have noticed while going down the highway I am getting a bit of white smoke out the back...not giant plumes, but just enough to notice the haze.

what I have:
84 F250, C6, dually, 2wd, 8K original miles

what I have done: (concerning fuel delivery)
new balanced injectors...purchased here on the forum
complete new fuel return.
ATF treatment to the IP
New lift pump
new fuel filter
note: no noticeable contamination/mixture of fluids...oil/coolant, starts right up every time, just like a brand new truck. very small puff of white smoke on start up...very small. no noticeable smoke at less than highway speeds or at idle.

no leaks anywhere in the fuel system.


any advice is greatly appreciated.
 
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