deep rumble sound at idle [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: deep rumble sound at idle


elhuntr06
04-05-2008, 07:15 PM
What tables do I need to change to get the deep rumble at idle on a LBZ.

Countrybob04
04-05-2008, 08:21 PM
I assume LBZ would be same - On LLY you change desired boost tables from 0-1000 RPM Down to 45 mm3 to 0.... change vane target position also to 0. you will still hear "vacuum" sound from vvt at startup for vane test... then will go to the rumble until over 1000 RPM's.

TheGrouch
04-05-2008, 10:27 PM
Turbo Vane Target Position (6 tables covering EGR on/off and 3 altitudes)
Turbo Vane Target Position Maximum (3 tables)

For cells 0-1000RPM and 0-15 mm3, enter 10.

bballer182
04-06-2008, 02:04 AM
Don't mess with the boost just the vanes like TheGrouch said

elhuntr06
04-06-2008, 01:27 PM
I changed the desired boost tables like countrybob04 said an have a code coming up P0299

HeavyHD
04-06-2008, 04:36 PM
They shouldnt have been set that low. Tables b2210-b2225, 400,600&800 down to 25mm3. Set those to 20 and you will have what you want without a code. When they were set to 0 the computer was mad because you had no boost at all...

elhuntr06
04-06-2008, 04:52 PM
ok I will try that thanks alot

HeavyHD
04-06-2008, 04:54 PM
Yup no prob man

bballer182
04-06-2008, 04:57 PM
They shouldnt have been set that low. Tables b2210-b2225, 400,600&800 down to 25mm3. Set those to 20 and you will have what you want without a code. When they were set to 0 the computer was mad because you had no boost at all...

Yeah, for sure. I was probably pretty pissed in that it was trying to make -14.5 psi of boost. The boost tables are compared to the barometric pressure. If you want no boost @ low altitude you have to set desired boost to 14.5psi.

If what i said doesn't make any sense watch this video http://www.duramaxtuner.com/video/flash_tutorials/Boost_considerations.html

huntinducks82
04-07-2008, 12:18 PM
What does the mm3 stand for on the chart you all are looking at while making these changes. New to efi live sorry for the dumb ?

NNYdiesel
04-07-2008, 12:36 PM
They shouldnt have been set that low. Tables b2210-b2225, 400,600&800 down to 25mm3. Set those to 20 and you will have what you want without a code. When they were set to 0 the computer was mad because you had no boost at all...

Would changing these tables create the same rumble with an LMM?

bballer182
04-08-2008, 12:54 AM
Would changing these tables create the same rumble with an LMM?

If i was you i would watch the video i posted in my last post.

bballer182
04-08-2008, 12:55 AM
What does the mm3 stand for on the chart you all are looking at while making these changes. New to efi live sorry for the dumb ?

Cubic millimeters of fuel injected per stroke.

NNYdiesel
04-08-2008, 12:50 PM
If i was you i would watch the video i posted in my last post.

I have already watched the video but wasn't very clear with my question earlier so here goes:

I have seen a few different recommendations about adjusting the turbo vanes from using 25%, 20% and 10% but which one is right or is it a matter of preference?

Also I read in another post on here, I can't remember which one, that you should make the adjustments all the way to 1000 RPM and 20 mm3 but Nick only adjusted to 800 rpm and 15 mm3 in the video so I am a little confused as to which way to go.

deadsquirrel
04-08-2008, 02:42 PM
mine are set to 2 in that range.... no problems here no desired boost changed either

vortecfcar
04-08-2008, 02:45 PM
Either method will work, no worries.

Nick

NNYdiesel
04-08-2008, 03:20 PM
Either method will work, no worries.

Nick

OK I was just a little confused and didn't want to screw something up. Thanks for the help guys.

floriduramax1
04-08-2008, 03:33 PM
Either method will work, no worries.

NickAny one else hearing the loud buzz after adjusting these vanes now?

stacks04
04-08-2008, 04:43 PM
no buzz here.