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hey guys im new to this site and a diesel mechanic myself and have to say that the write ups on here got me to solve my problem and i just want to say thanks to everyone. I have narrowed down my problem to be air getting into the fuel system between the tank and the inlet on my lift pump. Can anyone tell me or have a picture of which tube coming out of the tank is my feed to the prescreen filter assembly? i have a 94 12 valve automatic. thanks in advance.
 

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wow ok i bought 3/8 hose for the feed that looks like 5/8 if youre talking about the one alone not part of the module. Is that 5/8?
 

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I think he meant the larger of the two hoses on the left of the pickup assembly. I don't remember what the other, separate hose is. I'll let him chime back in for the final word on what he meant, but that's what I think he meant.
 

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Sorry I wasn't clear. To tell you the truth I didn't even notice the vent hose.
Fuel supply line is 3/8", return 5/16"
 
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