Ok the truck in my sig, had done this twice in the past month. It starts, then after 5 seconds it dies. No codes, And it does it twice then is fine. If I give it a little fuel it is fine! Whats goin on with this?

 

do you have the stock lift pump?

 

No Raptor 150 gph in signature

 

Sounds like it is the security system causing it.

 

My truck did something similar the other morning. It fired once and then died. It did this three times, and then I gave it some throttle and it started just fine. It hasn't done it since? My truck doesn't have a security system. My lift pump has been replaced by the factory, it's in the tank now, and the fuel filter only has 2K miles on it. No codes either. I didn't check for soft codes though.

 

My 06 does this from time to time and ended up being a problem with the key (sim key or whatever it's called).