Have you tried putting clear hose on the return side to see if there is air in the fuel system?

 

not yet. it runs perfectly fine it only does it on startup its hard starting.

I have good fuel pressure tight connections no leaks.

I noticed its harder to start the lower the fuel level is. starting to think fuel is draining back into tank. don't believe its the pick up tube because its brand new. OFV is new. all fuel lines are new.

losing my mind. going to try a new filter tomorrow.

 

what does it idle at?

 

800, but it always did

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I put my foot on it and it starts right up let it idle and almost every time I let me foot off after 10 secs of idling it sputtered for a second and idles fine and doesnt do it again until I shut it off

 

it sounds like air is getting introduced from somewhere

 

That is why I suggested to hook up a clear hose on the return line and verify for sure there is no air in the fuel system

 

now let me ask you guys a question. If I set up a fuel pressure gauge and I am getting 25 psi and it's solely drops after I shut the truck off is this a normal thing or should it stay pressurized

 

It may not bleed back off but the pressure will drop.

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Im leaning towards the check valve being bad in the lift pump

 

This thread has gone round and round when all that changed was a big line kit. Wouldn't that mean that the cause most likely be in the big line kit? If I was having this much trouble I'd find someone who knew what they were doing and let them fix the truck!

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