2004 F150 SuperCrew Lariat

Posting on a couple forums, I really need ideas

Long story short, truck has been "sick" for the last month or so, now it won't start. I bought it new in 2004 and it now has 268k on it

Truck was running fine, it broke a timing guide which was replaced with a complete oem timing set. After putting it back together, it wouldn't start and acted like it wasn't getting fuel. We got it to start on ether and then it seemed to run fine. Not the first timing set I've put in this truck....more like the 3rd

It was having problems idling, which got progressively worse....shook the whole truck. At 1000 rpm it, it obviously wasn't running right but wasn't violently shaking. It would come out of it at about 1500 rpm and the motor would run noticeably better. This behavior was mostly after the motor was warm. Most of the time when it was cold it didn't act up, but there were times when it did the same with the motor cold.

Last Sunday I ran a quick errand (about a mile). It barely ran, died at the gas station, was hard to get started. About half way home, it died in the road, was hard to start but eventually did enough to get me home. Hasn't ran since

As it sits now, when the key is turned there is no sound from the fuel pump and it will not start or even try to start. Haven't tried ether

Over the course of this adventure I have replaced the following parts with no change in behavior

Throttle body
MAF
VCT (both)
FPDM
Fuel Pump
Alternator rebuild

Any ideas??

Thank You!

Ed.

 

What codes have been thrown?

 

Most of the normal ones they throw when they aren’t happy

0345
0340
0340
0190
0191
0012
0011

im sure there are others

 

It sounds like 1 of 2 things (or both!):

1. Timing is off.
2. CPS is broke or disconnected.

When the crank sensor goes BAD, you'll get a No Spark- No Start Condition... so, if you're getting spark from the ignition coil pack or the Coil-on-Plug ignition coils.. the crank sensor is good and this test will not help you.

Good luck.

 

Timing isn't off, if it was it would be obvious any time the truck was running. It ran great a lot the last few weeks, but also ran terrible the last few weeks prior to it not running at all last sunday. I haven't ruled out CPS but this is intermittent and only seems to happen when the motor is at operating temperature.

I'm getting FPDM offline error (got a better scanner), now I'm thinking the fuel pressure regulator is stuck in whatever position it is in to report to the pcm that would make the pcm not start the FPDM thus the fuel pump isn't running. I'm assuming there is some kind of mechanical device that measures the pressure in that sensor.....if it's been on it's way out it could certainly cause idling problems (I would think)

Where does that vacuum line come from on this sensor.....it disappears behind the motor? Any way to test these?

 

Fuel pressure sensor not the problem

Still saying FPDM offline
Also saying P1000 test not complete

 

P1233 FORD - Fuel Pump Driver Module Disabled Or Off Line

Possible causes

Inertia fuel shutoff (IFS) switch needs to be reset
Faulty Fuel Pump Driver Module (FPDM)
Fuel Pump Driver Module (FPDM) harness is open or shorted
Fuel Pump Driver Module (FPDM) circuit poor electrical connection
Faulty Inertia Fuel Shutoff (IFS) switch
Faulty Powertrain Control Module (PCM)

Read more: https://www.autocodes.com/p1233_ford.html

 

Checked the IFS, it wasn't tripped

Starting to look like I'm down to an electrical connection / wire problem or the PCM itself (which I've read is unlikely)

 

Have you checked the FPDM itself up by the spare tire for corrosion - which knocks it out of action?

 

First post says the FPDM has been changed.

 

My bad, but what brand of FPDM was used to replace the original. I've seen Dorman units die in pretty short order.

 

It was a Dorman

 

Dorman FPDM's have a very high DOA rate.

 

I don't think it's a DOA FPDM, according to the scan tool I used yesterday the PCM isn't communicating with it at all. I also at this point don't believe my original one was bad, it didn't have any corrosion on it....I replaced it several years ago and smeared a ton of silicone on the back of it before installation. I peeled the silicon off and it was still shiny underneath.

I'm starting to lean towards the power distribution box, the FPDM relay is built into it.....I guess they are a known problem and there are a TON of them on ebay. Ordered one from a bone yard in Florida, will have it in a couple days.

I've also seen posts online where trucks were having similar issues I've been having prior to the relay going bad

 

Just to update this....problem found

So the FPDM can actually die a natural death. Mine had 0 rot on the back of it. Prior to dying it was overfueling the motor, when the motor was cold the pcm and the motor accepted it but once the motor got up to operating temp it really, really didn't like it. Washed out all the cylinders on bank 2.....no compression on any of the cylinders and leakdown test confirmed compression going to the crankcase.