Crank no start.

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Nov 25, 2024 | 06:03 PM

Jadco

Thread Starter

8th Gear

Joined: Dec 2023

Posts: 8

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Crank no start.

I have an 07 f150 5.4. It has 330000 miles on it and runs great , that is up until yesterday. I got in it to go somewhere and it just cranked like it was out of gas.
what I’ve checked are these.
1 fuses, all good
2 just listened for fuel pump operation, all good but I haven’t checked fuel pressure
3 put a scanner on it ,key on truck not running, and pulled these codes.

P1000
P1288
P1397
P1000-FF
Basically sounds as though it’s a PCM problem?
How does that just break? I figured I would have some sort of warning like rough running, poor shifting etc. I did a visual of the engine and everything seems to be in order.
i did notice when I was cranking it I was getting an electronic tic coming from either the fuse box or somewhere on the right side .
Any input would be greatly appreciated. Thank you.

Nov 28, 2024 | 06:57 AM

redfishtd

Fleet Mechanic

Joined: Apr 2016

Posts: 1,653

Likes: 193

Try to start it with starting fluid . That should let you know if its a lack of fuel . I'm not sure your cranking has been hard on battery and caused those codes with low voltage . This time of the year bad batteries show up , cold does not kill batteries heat of summer does , But cold reduces the flow out of a weak battery .
The major item that causes a lack of fuel is the fpdm module on the rear axle . You must inspect it for corrosion as it is aluminum backing sitting on steel and they eat each other . Then water gets inside module . New ones come with plastic spacers to stop metal contact .. They have a high fail rate .
You can turn key on with scanner attached and it will tell fuel pressure on rail . Torque pro $5 app on an old android with a cheap amazon bluetooth reader will tell you lots of stuff .
If you search fpdm on this site tons of pics and info will pop up . As well as a sticky at the top of page .

Dec 7, 2024 | 09:38 PM

Fifty150

Logistics Pro

Joined: Oct 2007

Posts: 4,865

Likes: 497

Suck Bang Blow

You need fuel, air, and spark.

Is the engine deprived of air or fuel?

There are a lot of troubleshooting tutorials....... you just have to look for them.

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