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Old 04-23-2011, 08:39 AM
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Hydro-Boost Replacement

Has anyone replaced their Hydro0boost? I am in process of switching it out. I have everything hooked back up but i need to bleed system which requires cranking engine without starting it! I dont know how to keep my 7.3 from starting!!!

If you let it start it blows the "O" ring seal at the hydro-boost....oops

Any help is appreciated.

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Old 04-23-2011, 08:41 AM
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Originally Posted by 28checkmate View Post
Has anyone replaced their Hydro0boost? I am in process of switching it out. I have everything hooked back up but i need to bleed system which requires cranking engine without starting it! I dont know how to keep my 7.3 from starting!!!

If you let it start it blows the "O" ring seal at the hydro-boost....oops

Any help is appreciated.

What year truck?
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Old 04-23-2011, 08:58 AM
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2002 f-350 7.3
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Old 04-23-2011, 09:01 AM
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Pull the #30 fuse. It powers the PCM and won't let it start.
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Old 04-23-2011, 09:04 AM
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Thank you! I appreciate the help!
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Old 04-23-2011, 09:06 AM
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Originally Posted by 28checkmate View Post
Thank you! I appreciate the help!
No problem. Instead of pulling that fuse, you could pull the one for the fuel pump but I don't know what number that is. The owners manual will tell you if you have one.
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