2002 F550 7.3 PSD suddenly wont start
Thread Starter
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Laughing Gas
Joined: Apr 2004
Posts: 776
Likes: 42
From: STL MO
2002 F550 7.3 PSD suddenly wont start
Always starts on first try. Idling for a few min to warm a few days ago and just died and not starting again.
full oil
new batteries,
new starter,
completely new battery harnesses installed last year,
cranks hard and over 10V while cranking. rpm needle no move, replaced CPS with new one from Ford dealer. still no rpm bump while cranking.
What do I do next?
could someone share the "7.3 no start trouble shooting guide" used to have it. THX. Erwin
full oil
new batteries,
new starter,
completely new battery harnesses installed last year,
cranks hard and over 10V while cranking. rpm needle no move, replaced CPS with new one from Ford dealer. still no rpm bump while cranking.
What do I do next?
could someone share the "7.3 no start trouble shooting guide" used to have it. THX. Erwin
Lead Driver
Joined: Jul 2017
Posts: 6,855
Likes: 2,332
From: WV
Here’s a link to the no start chart. For future reference, I pulled it from inside the tech folder sticky. https://www.ford-trucks.com/forums/a...6&d=1564895572
I don’t think your 2002 will show rpm while cranking.
How’s the fuel level?
I don’t think your 2002 will show rpm while cranking.
How’s the fuel level?
Thread Starter
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Laughing Gas
Joined: Apr 2004
Posts: 776
Likes: 42
From: STL MO
Thank you all for ur input. I'll try to work on it after the big snow here in st. louis, 8-12 inches tonight. All, be safe!
Laughing Gas
Joined: May 2024
Posts: 908
Likes: 290
From: E TN
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Laughing Gas
Joined: Apr 2004
Posts: 776
Likes: 42
From: STL MO
Yes, wts light is good. Like atates, it died during idling while warming up. Till then, it starts every time.
will test fuel pressure and so on when snow is cleared.
will test fuel pressure and so on when snow is cleared.
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5th Wheeling
Joined: Oct 2024
Posts: 29
Likes: 4
could possibly be a fuel pump, if you can check the fuel bowl and make sure its filling up with the key in the "on" position, the one just before cranking, it will run for around 20 seconds. they will run with the fuel pump out but very poorly and won't idle long. if possible use forscan and plug your laptop into the OB2 plug and see if you get any codes could help pinpoint an issue. Also i saw your looking for a connector for forscan, you can use a cheap one like this
I use one similar to that, and it works fine for just testing codes etc.
Cargo Master
Joined: Apr 2012
Posts: 2,024
Likes: 526
From: Bottom Of Pikes Peak
I know others have used non approved products with success
one of these days, i will see if I can figure out how to use forscan...I'm the type of person that does not like change and does not like to learn how to use new stuff, lol.
Lead Driver
Joined: Aug 2022
Posts: 5,065
Likes: 1,415
From: Oologah, OK
I started it up on top of the hill, pulled a trailer downhill and lost 100 ft+ elevation going down.
When I circled the truck around to backup the trailer, the front wheels went up on a higher berm in the feedlot.
It died right there....
I could wait a bit, KEON, crank and it would start and run for a minute and die.
the fix, was a new fuel pump.
Laughing Gas
Joined: May 2024
Posts: 908
Likes: 290
From: E TN
I understand it did work. From memory of the fuel heater shorts it can blow the fuse and the WTS light won't work nor will the PCM or the fuel pump.
Thread Starter
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Laughing Gas
Joined: Apr 2004
Posts: 776
Likes: 42
From: STL MO
it's super cold here in st. louis after recent snow storm. went out today, hooked up the mechanical fuel pressure gauge. it reads 52psi. so CPS fuel pressure are all eliminated. next on the chart are ICP and IPR. I have good parts from my totaled 2000 psd and will use them tomorrow to try.
