6.4 Starting problem

[dsaalease]

This weekend I had some starting problems with my '08 F-250. Saturday I pulled it out of the garage, then shut it off. A few minutes later I tried to start it, it wouldn't turn over. There was a click somewhere on the firewall, nothing more. I scratched my head for a while, then took each battery cable off to clean the connection. Then the truck started. I left it run for a minute then shut it off so I could put my tools away ect. Go back to the driveway and the truck wouldn't start. More head scratching , then I took the batteries out to get them tested.Tested ok, surprised the dealer didn't try to sell me a new set. Came home, put it back together, doesn't start. Later it started, I backed in the garage, and shut it off. I then started it and turned it off 4 or 5 times. Looked like problem solved, so we went on a camping trip, about 250 miles. After we got home, went to eat, started fine, stopped at a car wash on the way home. Didn't want to crank at the car wash, didn't have tools with me, but I lifted the hood, looked around and closed the hood. Got in the truck, and it started ok.

It obviously isn't a battery problem, I don't think it is a starter problem, and I hate to replace the starter for the heck of it due to the cost. Any ideas?

[rollincoal6.4L]

you most likely have a failing egt sensor, there is three of them, so it is hard to tell which one is the culprit, but at the dealership i am a tech at, we see alot of failures of egt 3 which is the one closest to the muffler.

[peteoreo]

What about starter relay in fuse panel ?

[dsaalease]

Originally Posted by rollincoal6.4L

you most likely have a failing egt sensor, there is three of them, so it is hard to tell which one is the culprit, but at the dealership i am a tech at, we see alot of failures of egt 3 which is the one closest to the muffler.

If it's a EGT sensor, does the engine/exhaust temp make any difference? Two of these times, the truck had only been ran for a couple minutes. I'll take the truck the truck to the dealer this week to have them scan the ECM. I did have someone mention it may be loose connections at the starter, I'll look at that today. I need to get this figureed out before we leave for vacation.

[SullyZX2SR]

Hey bud,

Did you ever get a resolution to this? I bought my truck last week (an '08), and it's doing something similar. When I go to crank it, it will occasionally act like it doesn't have enough juice for a second, and then it fires right up. It has started for me every time, but it's a little disconcerting.

Thanks in advance.