Ok. I just put a new tune in and a noise is coming from my turbo, only when I turn the key to run and turn it back off (without starting the truck). What could it be?
Loading a tune and now a noise?
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Is is almost a buzzing sound? Does it do it twice in a row? You probably have not noticed it before but it usually does that when the truck shuts off. If you are not starting the truck I don't think there is really much noise the turbo can make. I have heard the noise when turning the truck off is a some type of pressure release, possibly fuel pressure. I could be totally wrong here, but maybe I am not.
On the LMM you are hearing the IAT (Intake Air Valve) cycling.
Thanks, good to know.
Send me a pm with you email address and if you don't mind will you check my tune for me?
Im uploading a video right now to show you, I'll post the video here.
Im uploading a video right now to show you, I'll post the video here.
I had a one LBZ trucks do that after tuning, not really that loud though. As far as I could tell it was the actuator on the VVT, loaded a different tune though. Never investigated much.
GMC_2002_Dmax
The Still Master
See this thread for more details...
http://www.dieselplace.com/forum/showthread.php?t=268066&highlight=buzz+shutdown&page=3
Nick
http://www.dieselplace.com/forum/showthread.php?t=268066&highlight=buzz+shutdown&page=3
Nick
could of just posted this
Quote:
Originally Posted by bballer182
i haven't personally done it but i would imagine that you change the position in the 300 rpm column and from 0-15 mm^3 rows back up to 80%
Baller's on it. Change the columns below idle RPM back to stock.
Nick
I adjusted my vain tables and it did stop the noise. Now I have a few other issues in the tune I'll start a new thread on.
My LLY has been doing something similar (but not as loud) intermittently when I turn the key on. Took me a while, but I finally figured that it's something to to with the VGT.
Other than the top left of the vane tables being out to lunch, the rest of the tune looks ok.
One strange thing I noticed, the size of the .tun file is ~1300kb. Normally, they are around the 880-890kb range.
IS there maybe something attached to the .tun file I couldn't see?
Maybe it's corrupted?
I would honestly try the copy/paste method and then compare file size. As was said before, scripting sometimes doesn't work that well. IIRC, Pat doesn't like to script for this reason.