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4.9 wont start right away when sitting for more then a few hours

F 150Cobra

"Wild HoRsE" Got Torque?
3,642
104
Aruba
It will not start on the first try but right away on the 2nd try in the morning and like when i get off work also it wont but when driving stop and shut it down for a few mins its fine

The fuel pump is wired seperatly and i even let it run for like 10 seconds nothing..

I was thinking chek valve in fuelpump? But the whole unit is new..

Im gonna try in the morning bleed the fuel on the rail before i start see if that helps then in know its getting air somehow?

Any ideas?
 
might be leaking injectors (flooding the engine) then when you try the second time fuel was blown away, turn on ignition switch but don't try to run the engine, then turn off and check spark plugs.
or maybe its the ecu relay having a small build up on the internal contacts (not sure just guessing some things...)
 

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