I have a 2009 Ford F150 SuperCrew with a 5.4 V8. Recently we have had tons of rain and a lot of dampness. 2 weeks ago, I drove my truck about 30 miles, turned it off and then tried to restart it as I was going to wait in my truck for my appt. It wouldn't start. It would crank and kept cranking but would not fire. I let it sit for about 5 minutes and it started like normal.

2 nights ago, I left my son's home, started the truck (started fine), reversed out of driveway, put in drive, gave it some gas, went approximately 50 feet where everything went dead and I coasted to a stop. It would not restart immediately. Cranked and cranked, no fire.

My son was able to push me back into his drive after about 5 minutes. Once there, I tried it again and it started.

Yesterday, I started truck in the morning, drove about 5 minutes. Stopped at a stop sign, gave it some gas and it went dead again! Would not restart. Let it sit for 5 minutes and it restarted but running rough. Drove to a local used car dealer where I bought the truck 3 years ago and shut it off. They did not have the proper equipment to do anything. However, when the service manage came to drive it, it would not start. This time, it sat for a total of 20 minutes before it would start. Drove it to a local garage. It has not acted up at all while at the garage. However, it started clearing up by the time I got it there and the rain and dampness has moved out of the weather in our area.

During all of this it is not throwing any codes whatsoever.

Any ideas?
Thanks!

 

Sounds like a fuel problem. In the 04-08 5.4l there's a fuel pump driver module that's located above the spare tire on the frame and that tends to corrode and cause fuel problems. I'm not positive if the 09-10 have the module in the same place. I'll post a link to an 04-08 section that's all about that issue. Also another common problem to stalling is a dirty mass airflow sensor especially if you have an oil filled air filter, also cleaning the throttle body. All pretty easy to do and I'll post links for it all.

Here's about the module: http://www.f150forum.com/f4/fuel-pum...-yours-152908/
And here's one for cleaning the throttle body and mass airflow sensor: http://www.f150forum.com/f72/how-cle...ody-maf-75006/

 

Do you have more than 1 ford key on your key ring. I had a problem with one of my trucks that did something similar and the security system was failing to recognize the correct key. If I remember right it just stopped acting up and worked right a few days later

Matt

 

Nalb221,
We thought this too, but it is not the problem. Actually, Ford realized the rusting problem and starting with the 09, they made the modules plastic.

Norfolknova,
I took both of my keys off of the rings and tried each one separately. We thought it might be the chip. That's not the problem either.

We're thinking it has something to do with rainy weather and a lot of dampness in the air. I picked it up from the garage last night and it's been doing fine. I am noticing a little rough running; especially climbing hills.
Thanks for your replies!

 

The rough running sounds like moisture in the fuel to me. I have had this problem multiple times on all four vehicles I've owned. Generally happens after they have sat for a few days when the weather was one of rainy, extremely humid at night, or drastic temperature changes. Little isopropyl alcohol (red bottle of Heet) and fill the tank and it's cured.