Ford6955

Yesterday, while I was driving the engine shut off, and the dashboard stated to look at gauges. It took at least three tries to get the truck restarted. This is the third time that this has happened. The time yesterday, I was in a residential area, so I was not going that fast. The previous two other times I was going full speed on the freeway, when the engine just shut-off. Is there anyone else that has had this problem. The vehicle that I have is a 2005 Ford F-150 4x4 with a 5.4 litre engine.

SCORGE

Hmm....
Fuel Pump Drive Module?

BadFish523

That's worth a shot to at least check the FPDM. It don't cost you anything to check the casing for corrosion.

SCORGE

Any warning lights...check engine lights...anything?
If the FPDM gets corroded..it can cause no starts, shut-offs, bad idles..

Dirttracker18

^^^^ This ^^^^

Mod (Ret.)

At the very least, get a hold of a diagnostic scanner, plug it into the OBD-II connector (located under the dash to the left of the steering column), and get any codes that are stored. Then google each code (and/or post them here) to gain additional information as to why the engine is shutting down.

As several have stated, the FPDM module can be the culprit. It is the module that turns on/turns off the electronic fuel pump.

Ford uses this setup to continuously turn on/turn off the fuel pump (located in the fuel tank) to maintain fuel pressure to the fuel rails that feed the fuel injectors. Since Ford did away with a fuel line return back to the fuel tank (to prevent vapor lock), the fuel pump is turned off/turned on during run. There is no fuel pressure regulator on these trucks; the FPDM replaced that function.

The FPDM is located by the spare tire below the rear of the trucks bed. Dropping the spare tire will be nessesary to get at it. It will be mounted on a crossover rail in front of the spare tire. You will want to remove it (two bolts). The backside of this module gets corroded, and exposes the internal electronics to moisture and dirt. A common fail point if the problem is fuel related. The new replacements have spacers that allow for a gap between the module and the rail, to prevent any water, snow, salt to build up and corrode the backside.

toostroked

My son's 2010 with the 5.4 was doing this. The fuel pump fuse had a crack in it. Changing the fuse fixed the problem.

bourgeois1269

I have an 06 4x4 that shuts off at least 4 times a week and I have to put it in N to restart then I'm good for the rest of the day.

Def Bunn

https://www.morepowertuning.com/how-to-idle-relearn

Def Bunn