7.3 Won't Start - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 19 (permalink) Old 03-29-2010, 07:51 PM Thread Starter
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7.3 Won't Start

Alright - after replacing the ICP about 1000 miles ago, the truck ran well. It began hesitating a little over the weekend and grew TERRIBLE during Sunday and today....

I decided to replace the Fuel Filter as a precaution, and did about 10 minutes ago - fired it up, let it run about 5 minutes, backed out of the driveway, it cut off on me, and now it won't restart.

Any ideas?

Oil Level is not a problem, Fuel Level is not a problem - I did the CPS recall, but I am going to go out right now and look. I am worried that sounds like the culprit. EDIT - just looked, and I have the Gray one....

Thoughts?

EDIT again - I show nothing on the Tach when I crank it over, and I believe that signal comes from the CMP (CPS) doesn't it?

Last edited by Seafordguy; 03-29-2010 at 08:01 PM.
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post #2 of 19 (permalink) Old 03-29-2010, 08:19 PM
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Most likely is the CPS.


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post #3 of 19 (permalink) Old 03-29-2010, 09:12 PM Thread Starter
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Replaced CPS, started up, drove 200 feet, cut off??
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post #4 of 19 (permalink) Old 03-29-2010, 10:44 PM Thread Starter
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Originally Posted by Seafordguy View Post
Replaced CPS, started up, drove 200 feet, cut off??
Can hear the fuel pump on the frame rail running.

When I took the cap off the fuel bowl and cranked it it filled the bowl in about 10-12 seconds. Is that sufficient fuel pressure?

NO smoke at all.....
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post #5 of 19 (permalink) Old 03-29-2010, 10:59 PM
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Quote:
Originally Posted by Seafordguy View Post
Can hear the fuel pump on the frame rail running.

When I took the cap off the fuel bowl and cranked it it filled the bowl in about 10-12 seconds. Is that sufficient fuel pressure?

NO smoke at all.....
Do a fuel pressure test. Have you done a buzz test on the injectors.

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post #6 of 19 (permalink) Old 03-29-2010, 11:08 PM Thread Starter
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Do a fuel pressure test. Have you done a buzz test on the injectors.
No - can you walk me through that?

I'll search in the mean time....
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post #7 of 19 (permalink) Old 03-30-2010, 01:14 AM Thread Starter
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Started up, drove about 200 feet, crapped out on me, wouldn't restart??

Can hear the fuel pump on the frame rail running.

When I took the cap off the fuel bowl and cranked it it filled the bowl in about 10-12 seconds. Is that sufficient fuel pressure? It will build pressure in the bowl such that when you let the drain petcock out it comes squirting out.

NO smoke at all.....

It just sat for a while and when i just cranked it, it started and ran for the briefest of seconds, and now won't restart at all?

No codes.

It is almost as if it isn't getting any fuel at all?
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post #8 of 19 (permalink) Old 03-30-2010, 02:53 AM
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No - can you walk me through that?

I'll search in the mean time....
Which one do you want a walk through on.

Have you checked your voltage on the IDM as well?

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post #9 of 19 (permalink) Old 03-30-2010, 02:56 AM
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Mine did the same thing couple of weeks ago. Turned out to be feul pump. Funny thing i could hear it running & felt the virbration & it was still bad.
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post #10 of 19 (permalink) Old 03-30-2010, 02:58 AM
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Originally Posted by dshackle3 View Post
Mine did the same thing couple of weeks ago. Turned out to be feul pump. Funny thing i could hear it running & felt the virbration & it was still bad.
I want him to test the pressure first, even though you had a simular symptoms, doesn't neccesarily mean that's the problem.

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