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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 Wed, April 20th, 2011, 01:02 AM
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907DAVE 907DAVE is offline
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Any codes generated from the buzz test?

Seems as if you have a internal HPO leak. Might try cranking it with the valve covers off and see if you can find where it is going. I had one once where an injector poppet stuck open and would bleed of all of the pressure. Also one or more of the upper injector o-rings can leak, causing similar issues.
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Old Wed, April 20th, 2011, 08:14 PM
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OK had to work all day today. When I ran the last buzz test a couple of days ago I got a 1266, 1268, 1276 and 1278: high to low side short and high to low side open on #6 and #8. Would those cause a leak?

It will be Monday before I get back to work on it. Like a dumb a*% I let a wrench slip and broke the nipple threds on the fuel pressure relief valve, causing an awful fuel leak. I ordered a aftermarket one online it should be here Monday. I need a couple days break anyway...I'm way to close to seeing how hot an F-250 can burn.

I'll post the results Monday afternoon of any progress or at this point regress.
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Old Wed, April 20th, 2011, 08:47 PM
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There is definitely something up with those two injectors, but it is purely an electrical fault.

Were the wires your repaired for those two injectors?

There is more going on here than just that, though. You need to find where that HPO is going.
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