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Old 12-06-2011, 10:20 PM
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99 7.3 died now won't start

It was 5 degrees out and I started my truck to warm it up. When idle smoothed out I went into the house. 10 minutes later I come out and truck is not running. I try to restart by glow plug light doesn't come on and engine cranks over good but no start. The interior was warm so engine should have been warm enough to restart. Could it be the CPS? They checked it last year on recall but said I had the good one so they did not replace it. I've had the truck for 9 years and have never replaced the CPS. Other than losing two injectors at different times this last summer. It has always run good. Any suggestions?
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Old 12-06-2011, 10:22 PM
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Does the tach move while cranking, or does it sit at 0? Regardless of which cps you have, they do go bad. Just because you have the upgraded one doesn't mean it's perfect!
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Old 12-06-2011, 10:40 PM
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Originally Posted by dazdillenger View Post
Does the tach move while cranking, or does it sit at 0? Regardless of which cps you have, they do go bad. Just because you have the upgraded one doesn't mean it's perfect!
I just checked it. The tach does not move. And the glow plug light does not come on. It spins over good though.
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Old 12-06-2011, 10:43 PM
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If that tach isn't moving, more than likely the CPS is bad. Replace it, I bet she starts right up.
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Old 12-06-2011, 11:00 PM
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Originally Posted by dazdillenger View Post
If that tach isn't moving, more than likely the CPS is bad. Replace it, I bet she starts right up.
Thank You, I'll do that. The only store close to me is a NAPA. Are there chips good? And what should I tell them to get the right one?

P.S. Thank You for the info, you are a real help.
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Old 12-06-2011, 11:06 PM
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With the failure rate of the 7.3 cps, I wouldn't use anything other than OEM (ford or international). Good luck!
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Old 12-07-2011, 06:18 AM
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Wait a min.... The tach isn't going to move if the PCM isn't running.

If your WTS (Glow Plug Light) isn't coming On, chances are the PCM is Not running now. You're not going to see a tach signal then.... (although, by ALL means, Everybody should have a spare CPS - so go get one!)

To start though, I'd be looking at the fuses because it is VERY common this time of year to have your Fuel Heater blow fuse #30 and kill power to the PCM. So, check them ALL (especially #03-19-22) and see if you don't have a blow one. If you find #30 bad you'll need to unplug that heater at the bottom of the fuel bowl or it will just blow again
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Old 12-07-2011, 09:49 PM
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Originally Posted by NoRalPh View Post
Wait a min.... The tach isn't going to move if the PCM isn't running.

If your WTS (Glow Plug Light) isn't coming On, chances are the PCM is Not running now. You're not going to see a tach signal then.... (although, by ALL means, Everybody should have a spare CPS - so go get one!)

To start though, I'd be looking at the fuses because it is VERY common this time of year to have your Fuel Heater blow fuse #30 and kill power to the PCM. So, check them ALL (especially #03-19-22) and see if you don't have a blow one. If you find #30 bad you'll need to unplug that heater at the bottom of the fuel bowl or it will just blow again
Can someone tell where the #30 fuse is located at?
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Old 12-08-2011, 07:22 AM
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In cab, behind he panel under the steering wheel should have a#30 next to it

Do you have an owners Manual?
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Old 12-09-2011, 11:59 AM
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Well, I replaced the CPS and the #30 relay, and still no start. Shop cycled the glow plugs and it still didn't start. I am driving down to the shop to test all the fuses myself instead of paying the $100.00 dollars an hour for them to do it. Any suggestions for what else I should look at?
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