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1999 to 2003 7.3L Power Stroke Diesel
7.3L Power Stroke Diesel equipped Super Duty and Excursion.


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Old Thu, September 9th, 2010, 02:19 PM
DND58 DND58 is offline
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Tiny, on the inboard side of each valve cover, you can see a wire harness connected to the valve cover. You can disconnect this harness, and use an ohm meter to see if you may have trouble under the valve cover.

Test on the pins going into the valve cover to read resistance from the glow plugs and injectors. Getting good contact of the test leads to the pins can be a pain.

G G I I C I I G G

Test between "I" and "C" to test the injectors, should be less than 5.0 Ohms.
Test between "G" and battery ground to test glow plugs. Should be between 0.6 and 2.0 Ohms.

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Old Thu, September 9th, 2010, 02:50 PM
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Thats about the best way to check!

But beware, if the connection problem is intermittent the the test results can be misleading and a visual inspection will be necessary.

Good Luck.
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Old Thu, September 9th, 2010, 02:58 PM
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Thanks I will check that when I get home tonight and hopefully get some results. Will let you know
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Old Fri, September 17th, 2010, 04:47 PM
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Thanks guys, again

Thanks all that helped me out. I did the resistance tes on the passenger side, test good, I then hit the deiverside. I had to remove enough stuff to get my big hands in I just removed the valve cover, bingo. The connector had it's keepers streched, so that was my problem, I replaced my gasket and harness under cover. Been running for a week all good. Thanks again.
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Old Mon, September 20th, 2010, 05:47 AM
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Congrats!

If it happens again Ford sells a small plastic piece that you insert into the connector to stop it from wiggling loose.
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