Hi Guys,
I'm having hard time figuring out what's up with my truck. 2011 6.2 with 95000kms. Recently it's been having long cranks once warmed up.
Maintenance is all up to date and plugs changed out at 85,000kms.
I've checked the fuel pump fuse as I've heard that can be an issue on these, its good and no signs of burning/melting. Fuel pump primes every time I put the key in so I've tried inserting the key a few times to see if it makes a difference but doesn't seem to help at all.
I'm guessing now that maybe its a bad purge valve or maybe the check valve in the fuel pump. But it only occurs when the truck is up to temp. When it's cold it'll start great.
It all started one weekend when I let the tank get to about 10km to empty and I changed the battery out with the 850cca motorcraft battery. Doubt that makes a difference but the issue began the day after that. I was thinking bad fuel but I've had gas from numerous different stations since then. Returned the truck to stock and it made no difference. Once it's running it runs fine, idles fine, and has lots of power. No codes and good voltage.

Any ideas? I'm at a loss of what else to check before I just start throwing parts at it.

 

Any luck with this? I have the same issue. On colder days it starts without an issue but when it warms up it almost always takes two cranks. I'm completely lost too.

 

*HEADS-UP* The thread is 3-years old and mike11hd's last, and only login was also 3-years ago. More better would be to start your own thread.

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I have the 6.2 with this same issue. I don’t see a response that helps. This only happens on a hot day. Doesn’t happen in morning or evening starts. ]

 

 

I've had the issue too. But finally fixed it. The cause ended up being the fuel pump losing fuel pressure. I replaced the fuel pump a couple days ago and now it starts up like a new truck! Just make sure the cause isn't a bad fuse or the fuel pump module (located above the spare).