bourgeois1269

06 4x4, I've posted this several times but can't find the problem. When I first start my truck and drive within the first Mile going below 30 it'll just shut off on me so I put it in N and restart it and it's fine for the rest of the day. I've cleaned the TB, I've cleaned the MAF several times, changed the fuel filter several times and I used all appropriate cleaners. Something is telling my truck there's no power at that moment when it kills but I don't know what it is, any help will be greatly appreciated, thanks

elricfate

No other errors or codes being thrown?

Have you checked the FPDM under the spare wheel on the cross member?

Within the first mile, below 30mph... that's such a weird set of circumstances that it almost feels like correlation, not causation.

techrep

iTrader: (1)

What shuts off ? just the motor or does all the electrical power go off ?

2nd150

Could it be the Crank position sensor?

https://www.1aauto.com/content/artic...ensor-symptoms

4 yr old thread..See post#29 on page 3

https://www.f150forum.com/f4/2006-di...171183/index3/

bourgeois1269

The whole truck shuts off then my battery and one other light comes on as if I'm just starting my truck again but once I put her in to N and crank back up the lights go back off..........as if I was just starting my truck

2008__XL

As stated, have you checked the fuel pump driver module?

bourgeois1269

Unless I have a faulty one I replaced 2 yrs ago, I'm not sure it's that (FPDM)

bourgeois1269

I'm thinking either the fuel pump temporarily shuts off or something to do with the ignition switch. I don't have any warning signs, it just shuts off as if I turned the key off but like I said whenever it does that I put it in N and crank it it and its fine. And it's always after first crank within 10 minutes and going slow (5-20mph)

quinner30

could this be when the pcm changes from open loop to closed loop? does the check engine light illuminate for a moment when you first start the truck? maybe try swapping in a "known good" pcm.

bourgeois1269

It's not every day and when it does do it, it's only that one time running at normal temp. It's like someone hits a kill switch and I just restart it and I'm good to go but something has to be causing it.