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noise in engine after shutdown

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Old May 16, 2007 | 07:03 PM
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Red face noise in engine after shutdown

Just traded my 2000 7.3 for a 2005 6.0 a couple weeks ago. So far I really like my "new" truck. My question is when I shut down the engine there's something that sounds like a pump or something that runs for 10 or 15 secs before it shuts off. I talked to another guy with an 05 who says his doesn't do this. Any ideas what this might be
 
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Old May 16, 2007 | 07:07 PM
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Sounds like the "buzz" flash. It cycles the injectors after shutdown to purge them of oil to prevent stiction.
 
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Old May 16, 2007 | 07:24 PM
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Thanks. I did read about that on another post and thought that might be it. Just wanted to hear what you'all have to say
 
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Old May 16, 2007 | 07:28 PM
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Yup, I have an 03 with the 6.0 and I get the buzz before start and after shutdown.

Welcome to the site!
 
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Old May 16, 2007 | 07:32 PM
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Originally Posted by msgtg
Yup, I have an 03 with the 6.0 and I get the buzz before start and after shutdown.

Welcome to the site!
The buzz before start will probably be the vacuum pump.
 
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Old May 16, 2007 | 07:57 PM
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Had the same thing on the 03 and now the 05 after shutting down, mine is the turbo coasting down, all stock
 
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Old May 16, 2007 | 08:37 PM
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Originally Posted by msgtg
Yup, I have an 03 with the 6.0 and I get the buzz before start and after shutdown.
One should refrain from getting a buzz before driving.
 
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Old May 16, 2007 | 09:22 PM
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Sponge, if you dont like the buzzing, which some dont, theres a newer flash out that gets rid of it, and uses a different measure to accomplish about the same thing (stiction issues). Some of us are sticking with the buzz flash, but so far I havnt heard anything bad about the newer one, (Inductive Heating). Do a search and you can find a lot more about them if you want.
 
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