Go Back   AnandTech Forums > Social > The Garage

Forums
· Hardware and Technology
· CPUs and Overclocking
· Motherboards
· Video Cards and Graphics
· Memory and Storage
· Power Supplies
· Cases & Cooling
· SFF, Notebooks, Pre-Built/Barebones PCs
· Networking
· Peripherals
· General Hardware
· Highly Technical
· Computer Help
· Home Theater PCs
· Consumer Electronics
· Digital and Video Cameras
· Mobile Devices & Gadgets
· Audio/Video & Home Theater
· Software
· Software for Windows
· All Things Apple
· *nix Software
· Operating Systems
· Programming
· PC Gaming
· Console Gaming
· Distributed Computing
· Security
· Social
· Off Topic
· Politics and News
· Discussion Club
· Love and Relationships
· The Garage
· Health and Fitness
· Merchandise and Shopping
· For Sale/Trade
· Hot Deals
· Free Stuff
· Contests and Sweepstakes
· Black Friday 2013
· Forum Issues
· Technical Forum Issues
· Personal Forum Issues
· Suggestion Box
· Moderator Resources
· Moderator Discussions
   

Reply
 
Thread Tools
Old 09-18-2008, 11:46 AM   #1
jtvang125
Diamond Member
 
Join Date: Nov 2004
Posts: 4,726
Default Why do diesels blow a billow of black smoke when the accelerator is floored?

?
jtvang125 is offline   Reply With Quote
Old 09-18-2008, 11:57 AM   #2
amish
Diamond Member
 
amish's Avatar
 
Join Date: Aug 2004
Posts: 4,295
Default Why do diesels blow a billow of black smoke when the accelerator is floored?

the soot is unburned carbon compounds. this can happen due to a change to larger injectors or just regular wear on the engine. it happens mostly in colder temperatures due to the fuel not being full combusted.
__________________
Quote:
Originally Posted by JohnOfSheffield
And i have never, EVER been a member of any army.
amish is offline   Reply With Quote
Old 09-18-2008, 11:57 AM   #3
ViviTheMage
Lifer
 
ViviTheMage's Avatar
 
Join Date: Dec 2002
Location: Minneapolis
Posts: 35,090
Default Why do diesels blow a billow of black smoke when the accelerator is floored?

soot
__________________
Mad Genius Hosting -Web hosting, Cloud VPS, and Dedicated solutions...
30% off ALL services : AT30-vivi

vivi's blog

238-0-0
ViviTheMage is offline   Reply With Quote
Old 09-18-2008, 12:05 PM   #4
mooseracing
Golden Member
 
Join Date: Mar 2006
Posts: 1,711
Default Why do diesels blow a billow of black smoke when the accelerator is floored?

Because someone either hasn't kept their vehicle in tune or has adjusted teh injection pump to put more fuel into the engine.

The black soot is mostly unburnt fuel, on older vehicles it usually means the timing on the pump needs adjusted.
__________________
They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety. Ben Franklin

I have a CCW, it's called the 2nd amendment
-Nugent
mooseracing is offline   Reply With Quote
Old 09-18-2008, 01:21 PM   #5
Demon-Xanth
Lifer
 
Demon-Xanth's Avatar
 
Join Date: Feb 2000
Posts: 20,551
Default Why do diesels blow a billow of black smoke when the accelerator is floored?

These days, it means that they've really bumped up the power to the point that they're overfueling the engine and running rich. When this happens it doesn't burn the fuel very completely. Kind of like the difference between a cold fire burning leaves and a hot one burning oak logs.
__________________
Heatware: Demon-Xanth
UGTZ: DemonXanth
My ride
Demon-Xanth is offline   Reply With Quote
Old 09-18-2008, 01:31 PM   #6
Pliablemoose
Banned
 
Join Date: Oct 1999
Location: LA
Posts: 25,198
Default Why do diesels blow a billow of black smoke when the accelerator is floored?

To piss off marincounty?
Pliablemoose is offline   Reply With Quote
Old 09-18-2008, 01:37 PM   #7
Demon-Xanth
Lifer
 
Demon-Xanth's Avatar
 
Join Date: Feb 2000
Posts: 20,551
Default Why do diesels blow a billow of black smoke when the accelerator is floored?

Extreme examples:
http://www.youtube.com/watch?v=MlTQvOBsBOs
__________________
Heatware: Demon-Xanth
UGTZ: DemonXanth
My ride
Demon-Xanth is offline   Reply With Quote
Old 09-18-2008, 05:50 PM   #8
Jumpem
Diamond Member
 
Join Date: Sep 2000
Posts: 9,605
Default Why do diesels blow a billow of black smoke when the accelerator is floored?

Quote:
Originally posted by: Demon-Xanth
Extreme examples:
http://www.youtube.com/watch?v=MlTQvOBsBOs
Lots of power.
Jumpem is offline   Reply With Quote
Old 09-18-2008, 06:27 PM   #9
Dman877
Platinum Member
 
Join Date: Jan 2004
Posts: 2,710
Default Why do diesels blow a billow of black smoke when the accelerator is floored?

If you floor any car when the engine is cold, old or new, you'll see stuff coming out of the tailpipe.
Dman877 is offline   Reply With Quote
Old 09-18-2008, 07:28 PM   #10
angry hampster
Diamond Member
 
Join Date: Dec 2007
Location: Iowa City
Posts: 4,238
Default Why do diesels blow a billow of black smoke when the accelerator is floored?

Quote:
Originally posted by: Demon-Xanth
Extreme examples:
http://www.youtube.com/watch?v=MlTQvOBsBOs
And here's an example with trucks:
http://www.youtube.com/watch?v=QUlVK-ihE_8


I think the guy at the end sums it up.
__________________
Lights, cameras, glass, empty wallet.

[i5 2500k][HD4870 512mb][8GB DDR3 1600][Other Junk]

HEAT
angry hampster is offline   Reply With Quote
Old 09-18-2008, 09:15 PM   #11
Raduque
Lifer
 
Raduque's Avatar
 
Join Date: Aug 2004
Location: Texas
Posts: 10,992
Default Why do diesels blow a billow of black smoke when the accelerator is floored?

Quote:
Originally posted by: angry hampster
Quote:
Originally posted by: Demon-Xanth
Extreme examples:
http://www.youtube.com/watch?v=MlTQvOBsBOs
And here's an example with trucks:
http://www.youtube.com/watch?v=QUlVK-ihE_8


I think the guy at the end sums it up.
Those are dedicated race trucks.

I like this one as a better example: http://www.youtube.com/watch?v...2qj580&feature=related
__________________
Wrote a note said Be Back in a Minute
Bought a boat and I sailed off in it
Don't think anybody's gonna miss me anyway


Heat
ForSale
Raduque is offline   Reply With Quote
Old 09-18-2008, 10:46 PM   #12
zerocool84
Lifer
 
zerocool84's Avatar
 
Join Date: Nov 2004
Location: Los Angeles
Posts: 32,292
Default Why do diesels blow a billow of black smoke when the accelerator is floored?

Quote:
Originally posted by: Raduque
Quote:
Originally posted by: angry hampster
Quote:
Originally posted by: Demon-Xanth
Extreme examples:
http://www.youtube.com/watch?v=MlTQvOBsBOs
And here's an example with trucks:
http://www.youtube.com/watch?v=QUlVK-ihE_8


I think the guy at the end sums it up.
Those are dedicated race trucks.

I like this one as a better example: http://www.youtube.com/watch?v...2qj580&feature=related
Umm and that's an EXTREMELY modified truck with stock looking exterior.
zerocool84 is offline   Reply With Quote
Old 09-19-2008, 12:21 AM   #13
LTC8K6
Lifer
 
LTC8K6's Avatar
 
Join Date: Mar 2004
Location: Under an American chemtrail
Posts: 17,633
Default Why do diesels blow a billow of black smoke when the accelerator is floored?

On a modern stock diesel that means there's something wrong with it.
__________________
no offense, but does he have some sort of mental dissability? -nick1985

Brainwashed, mentally unstable, and stupid Intel user, screwed by Intel and located directly under a chemtrail.

Don't be a moron! Buy AMD!
LTC8K6 is offline   Reply With Quote
Old 09-19-2008, 03:09 AM   #14
DivideBYZero
Banned
 
Join Date: May 2001
Posts: 24,119
Default Why do diesels blow a billow of black smoke when the accelerator is floored?

Quote:
Originally posted by: Demon-Xanth
These days, it means that they've really bumped up the power to the point that they're overfueling the engine and running rich. When this happens it doesn't burn the fuel very completely. Kind of like the difference between a cold fire burning leaves and a hot one burning oak logs.
^this.
DivideBYZero is offline   Reply With Quote
Old 09-19-2008, 04:55 AM   #15
dug777
Lifer
 
dug777's Avatar
 
Join Date: Oct 2004
Posts: 24,778
Default Why do diesels blow a billow of black smoke when the accelerator is floored?

Quote:
Originally posted by: LTC8K6
On a modern stock diesel that means there's something wrong with it.
I know I've seen very new Merc and VW diesels smoke when floored when pulling on to the highway (well, it's two lanes either way), but I guess they're cold?

Usually Touaregs and big M-Classes.

EDIT: On a completely different note I head and saw someone floor a AMG S-Class on the way back from the shops just now, the howl was brutally spine-tingling
__________________
'I was eating pie'

Cheers for your support folks, you know who you are :beer:

Originally posted by: icejunkie

I hate how dug is in like the future and sh!t...
Official member of the ATOT Night Crew
dug777 is offline   Reply With Quote
Old 09-19-2008, 05:56 AM   #16
boomerang
Lifer
 
boomerang's Avatar
 
Join Date: Jun 2000
Location: Michigan
Posts: 13,411
Default Why do diesels blow a billow of black smoke when the accelerator is floored?

If you do it right, there's no smoke/soot at all.

boomerang is offline   Reply With Quote
Old 09-19-2008, 08:25 AM   #17
overst33r
Diamond Member
 
overst33r's Avatar
 
Join Date: Oct 2004
Posts: 5,599
Default Why do diesels blow a billow of black smoke when the accelerator is floored?

Quote:
Originally posted by: LTC8K6
On a modern stock diesel that means there's something wrong with it.
might wanna tell VW they don't know what they're doing.
__________________
.. 135
.. ╠╬╬╗
.. 246 R
Past | Present | Future
overst33r is offline   Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 03:27 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.