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Will not start

Tiny
REBEAUD9
  • MEMBER
  • 2004 INTERNATIONAL TRUCK
  • 7.3L
  • AUTOMATIC
  • 500,000 MILES
My 4300 dt466 wont start even with ether, wouldn't that mean I'm not getting power to something?
Wednesday, September 15th, 2021 AT 12:19 PM

7 Replies

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

So does it crank and not start?
If it cranks but not start then it could be fuel related. If it just clicks with no crank they it could be a battery or starter issue.

https://www.2carpros.com/articles/car-cranks-but-wont-start

You will have to check to see if you are getting spark to the plugs. If you have spark then you will need to check the fuel pressure.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Can you hear the fuel pump come on when you turn the key to on position?

Let me know.
Thank you.
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Wednesday, September 15th, 2021 AT 12:29 PM
Tiny
REBEAUD9
  • MEMBER
  • 5 POSTS
It's a diesel flatbed. It cranks. But i'm losing fuel pressure. I'm wondering if I have a check valve stuck open just don't where to look at.
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Wednesday, September 15th, 2021 AT 1:13 PM
Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Right, it uses the Ford 7.3L diesel.
Usually if the engine cannot sustain fuel pressure it might start but will stall after a little bit as soon as the pressure drops off.
If the pump is strong then it could be the fuel pressure regulator.
Unfortunately I don't' have access to the International truck repair catalog to provide you with the diagrams.
But if the regulator is weak, it won't be able to sustain the needed fuel pressure.
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Wednesday, September 15th, 2021 AT 1:34 PM
Tiny
REBEAUD9
  • MEMBER
  • 5 POSTS
The pump doesn't stay strong.
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Wednesday, September 15th, 2021 AT 1:37 PM
Tiny
REBEAUD9
  • MEMBER
  • 5 POSTS
Do you know where the check valves are located at?
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Wednesday, September 15th, 2021 AT 1:39 PM
Tiny
REBEAUD9
  • MEMBER
  • 5 POSTS
Where is the regulator at?
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Wednesday, September 15th, 2021 AT 1:40 PM
Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
On a F450 7.3L (sorry I don't have diagrams for the International trucks) it is located under the engine cover (see diagram below).
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Wednesday, September 15th, 2021 AT 1:52 PM

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