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Duramax Third Generation: 2006-2007.5 (LBZ & LLY) Discuss the third generation (2006-2007.5 LBZ & LLY) of the 6.6L Duramax diesel engine & associated components. 2006 LLY engine discussion also belongs in this forum due to the similarities of the 2006 LBZ and the 2006 LLY. Engine related discussion ONLY.

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Old 08-23-2019, 01:36 PM   #1 (permalink)
crreed
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Engine Buzz After Shutoff

I recently did the EFI Live 5 tunes and egr block to my 2006 LLY/LBZ with a zf6 Transmission and now I've got a small issue. I've read all the posts I could find on this but they all seem to be 9 to 12 years old so I'm looking for maybe a new idea or a definite cause and fix for this. Here it is...

After I drive for a bit, 10 min or more, when I turn my truck off there's a humming under the hood for about 28 seconds, then a click, and at 35 seconds changes to a loud buzz for another 6 seconds or so. It does this on any tune I set it to with or without the TB activated in the tune. I can shut the engine off immediately or let it idle a bit before I shut it off and either way it buzzes.

Is this a reaction to the tunes or something else? Will it hurt the truck or not? Is there a cause and/or fix for it? Just looking for some updated information to go on.

Here's a link to a short vid of it.




Last edited by OkDually; 08-23-2019 at 01:42 PM. Reason: repaired video link
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Old 08-23-2019, 01:45 PM   #2 (permalink)
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Last edited by OkDually; 08-23-2019 at 01:46 PM.
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Old 08-23-2019, 03:05 PM   #3 (permalink)
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Signature update

I believe I got it right.......
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Old 08-28-2019, 11:12 PM   #4 (permalink)
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https://www.dieselplace.com/forum/63...r-key-off.html

https://www.google.com/search?q=dura...hrome&ie=UTF-8
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Last edited by dwrat; 08-28-2019 at 11:15 PM.
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Old 08-29-2019, 01:54 PM   #5 (permalink)
crreed
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Thanks. I already read those posts and a bunch more to no clear end. I did however contact the guy who did the tune and he said he knew what it was and could fix it. I sent my autocal back to him to reprogram whatever it is he does. He didn't mention what he is changing. Soooo.....I guess I'll see in a few days when I get it back and reload the new tunes. Hope it fixes it.
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Old 08-29-2019, 03:51 PM   #6 (permalink)
mittens
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Mine did this but not all the time. have not herad it with new tunes in last week though.
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Old 08-29-2019, 07:14 PM   #7 (permalink)
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Quote:
Originally Posted by mittens View Post
Mine did this but not all the time. have not herad it with new tunes in last week though.
That's what I'm going for. No more Buzz.
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Old 08-30-2019, 08:13 AM   #8 (permalink)
Rvn4me
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Quote:
Originally Posted by mittens View Post
Mine did this but not all the time. have not herad it with new tunes in last week though.
Quote:
Originally Posted by crreed View Post
That's what I'm going for. No more Buzz.
buzzing sound from motor after key off
https://www.dieselplace.com/forum/63...r-key-off.html

Last edited by Rvn4me; 08-30-2019 at 08:16 AM.
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Old 08-30-2019, 01:49 PM   #9 (permalink)
crreed
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I'd say my problem is with the vanes setting in my tunes also. I'll know next week when I get mine back and installed.
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Old 09-10-2019, 01:50 PM   #10 (permalink)
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Is it normal for some buzzing noises for several seconds on shut off?

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