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Discussion Starter #1
I have a 94 7.3 idi with turbo that smokes rich white smoke I’ve changed injectors I’m swapped out almost every part possible and it still smokes if I pull the return line off and run it into a can it goes away I’ve replaced tank selection valve I’ve blown thru the return lines to check for back pressure issues and found nothing but I am at the point of going crazy anything helps thanks in advance
 

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Does it stop smoking when it gets off idle?
 

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Discussion Starter #6
It’s almost like it back builds fuel pressure I can drive 70 miles and then it won’t start for atleast an hour unless I purge the fuel system and let pressure off
 

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It sounds to me like it's time for an injector pump.
 
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