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LB7 GM Duramax Discuss the 1st Generation Duramax here |
10-06-2007, 05:04 PM
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#1
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Name: TexasHauler
Title: Rookie
Status: Not Here
Join Date: Oct 2007
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Posts: 6
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Black Smoke Problem
Hello Guys- Got a problem with my Dmax smoking black when going down the road. Any hill or if you get into the pedal you get heavy black smoke. Running down the highway you get a lesser amount of smoke.
I have an LB7 w/ EGR.
It's been @ the dealer for almost a week now and this is what they have done/ruled out:
-Injectors are fine.
-EGR is fine.
-Vacuum pump was found to be bad, replaced, no change.
-Turbo is fine.
-I put in new air and fuel filters prior to taking to dealer.
-MAF is not putting out codes, I advised dealer maybe they could check it anyway, this was friday right b4 closing, will probably check it monday. Would a MAF that was bad not put out codes?
I have NO drivability issues. Starts fine, idles fine, runs fine, no loss of power, if it weren't for the smoke you wouldn't know anything was wrong.
I am totally perplexed with this thing and so is the dealer. Anyone have any suggestions?
Thanks in advance, Steve
__________________
'04 3500 Dually, LB7 Dmax/Ally
4" MBRP Turbo Back Exhaust
Amsoil Dual Bypass Kit
Amsoil Fluids Throughout
Baldwin 2 micron pre pump fuel filter/water seperator
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10-06-2007, 05:55 PM
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#2
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Name: TopFueler
Title: Industrial Injection
Status: Not Here
Join Date: Oct 2006
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Posts: 841
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Put some fuel additive in it. Stanadyne would be a good choice. I have seen some smoking issues caused by ULSDF and the additive fixed the last few. Thanks
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10-06-2007, 06:48 PM
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#3
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Name: TexasHauler
Title: Rookie
Status: Not Here
Join Date: Oct 2007
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Posts: 6
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Quote:
Originally Posted by TopFueler
Put some fuel additive in it. Stanadyne would be a good choice. I have seen some smoking issues caused by ULSDF and the additive fixed the last few. Thanks
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Yup, forgot to mention that, it was the first thing we did. Plus I run Howe's additive in every tank.
Steve
__________________
'04 3500 Dually, LB7 Dmax/Ally
4" MBRP Turbo Back Exhaust
Amsoil Dual Bypass Kit
Amsoil Fluids Throughout
Baldwin 2 micron pre pump fuel filter/water seperator
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10-06-2007, 07:10 PM
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#4
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Name: kmkdiesel
Title: Too Much Time
Status: Not Here
Join Date: Oct 2007
Location: Idaho
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Posts: 780
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Maf sensor codes will more than likely not set off the check engine light but it will throw codes. You wont be able to tell unless you hook up a scanner.
Last edited by kmkdiesel; 10-06-2007 at 07:13 PM.
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10-06-2007, 08:03 PM
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#5
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Name: TexasHauler
Title: Rookie
Status: Not Here
Join Date: Oct 2007
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Posts: 6
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Yeah, it's been scanned and only 404 came up, which was addressed with the new vacuum pump. There was also a 380 code for a glow plug which seems to always be there.
Steve
__________________
'04 3500 Dually, LB7 Dmax/Ally
4" MBRP Turbo Back Exhaust
Amsoil Dual Bypass Kit
Amsoil Fluids Throughout
Baldwin 2 micron pre pump fuel filter/water seperator
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10-07-2007, 12:12 PM
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#6
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Name: joefarmer
Title: MR. Supreme Overlord
Status: Not Here
Join Date: Jul 2006
Location: ohio
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Posts: 6,137
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What did the balance rates read on the injectors at idle?
__________________
brandon'); DROP TABLE Users;--1948 Dodge 1.5t 12v RH swap | 99 F250 12v RE test rkt | 11 X5 'no soup' | 08 F250 CR RE swap | 05 2500 CR 68 standalone
firepunk.com
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10-07-2007, 12:48 PM
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#7
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Name: TexasHauler
Title: Rookie
Status: Not Here
Join Date: Oct 2007
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Posts: 6
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Not sure, they just told me they were ok.
__________________
'04 3500 Dually, LB7 Dmax/Ally
4" MBRP Turbo Back Exhaust
Amsoil Dual Bypass Kit
Amsoil Fluids Throughout
Baldwin 2 micron pre pump fuel filter/water seperator
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10-07-2007, 01:05 PM
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#8
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Name: JOHNBOY
Title: ZF6 Sled Puller
Status: Not Here
Join Date: Feb 2007
Location: Saegertown, Pa
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Posts: 1,854
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It could very well be your MAF sensor. Are you running a oiled air filter like the K&N? If os there could be a resuide of oil on the MAF causing it to read incorrectly. You can try cleaning it with electrical contact spray.
__________________
02 GMC 2500HD CCLB Dmax ZF6
There is nothing like the smell of incomplete combustion in the morning!
Quote:
Originally Posted by Gale Banks
My answer to the guys with nitrous........Get a better job........make some more money so you can learn to turbocharge!
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10-07-2007, 01:57 PM
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#9
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Name: Scooter's Roofing
Title: Too Much Time
Status: Not Here
Join Date: Oct 2006
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Posts: 17,007
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I didn't read where you checked for boost leaks
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10-07-2007, 02:02 PM
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#10
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Name: Pangela
Title: Not here.
Status: Not Here
Join Date: May 2007
Location: Northern California
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Posts: 3,524
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Black Smoke and Problem. Is that an oxymoron in the diesel world? I thought that was our main goal
Hope you get it all figured out.
__________________
peace out.
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10-07-2007, 02:57 PM
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#11
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Name: DangrousDuramax
Title: IPUFSMOK
Status: Not Here
Join Date: Aug 2007
Location: Houston, Tx
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Posts: 60
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Quote:
Originally Posted by TexasHauler
Not sure, they just told me they were ok.
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I've heard that one before. Seems that a lot of the tech's dont know to check the balance rates with the truck at idle and in gear. Just sitting at idle they can read fine but when you put it in gear they'll be all over the place. Ask they to show you what the balance rates are with the truck in gear. They are not supposed to be more than +- 3 from each other and that's the extreme on the spec. The #8 piston is also a noted point of interest on the DMax. Under heavy loads or lots of fueling the rod will start to shrink. Have them run a compression test.
__________________
05 2500HD CC/SB, LT, 2WD, Black
AFE Stage II; E/J w/A; 4" MotoBlue straight pipe w/black stainless 5" mitre stack; EGR blocked; Amber DRL's; Rancho RS9000X's w/in-cab controller; Quad train horns; Black 20" KMC Rockstar's & Dune Grapplers
US Navy EOD (88-96) - Desert Storm vet
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10-07-2007, 03:28 PM
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#12
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Name: kmkdiesel
Title: Too Much Time
Status: Not Here
Join Date: Oct 2007
Location: Idaho
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Posts: 780
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Also with the maf sensor rubbing alcohol on a qtip works pretty good for in the house items
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10-08-2007, 11:59 AM
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#13
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Name: crewgirl
Title: Inmate #28
Status: Not Here
Join Date: Feb 2007
Location: Small town Texas
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Posts: 4,913
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hmmmmmmm, If it were me my black smoke complaints would read something like, "When I'm driving down the highway and I look behind me, I can still faintly see the cars back there, how can I make the smoke thicker?"
If there seems to be nothing wrong, I say take it home and enjoy making people choke.
__________________
Quote:
Originally Posted by Sledpuller
What.. I love 24 valves......
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Quote:
Originally Posted by LOGANSTANFORTH
yes...set your purse down, pull your skirt up, and grow a set...
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Quote:
Originally Posted by SCHOOL BUS
dont argue with anna. she knows everything
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10-08-2007, 12:48 PM
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#14
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Name: AKDuramax
Title: Rice-Burner Burner
Status: Not Here
Join Date: Aug 2007
Location: Juneau, Alaska
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Posts: 145
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Since when is black smoke a problem?
hope you get it all fingered out
__________________
2002 Chevy 2500HD Duramax. Ext. cab short bed. AFE stage 2 intake, MBRP 4 inch turbo-back, Edge Juice/Attitude, BD Trans. Ultra wheels, 33x12.5 mud terrains.
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10-08-2007, 01:16 PM
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#15
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Name: SKYNYRD
Title: "Drunkard"
Status: Not Here
Join Date: May 2007
Location: Harpers Ferry, WV
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Posts: 5,666
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Quote:
Originally Posted by crewgirl
hmmmmmmm, If it were me my black smoke complaints would read something like, "When I'm driving down the highway and I look behind me, I can still faintly see the cars back there, how can I make the smoke thicker?"
If there seems to be nothing wrong, I say take it home and enjoy making people choke.
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i'm with you here. "wait i can still see the cars behind me. I NEED MORE FUEL CAPITAN!!!"
__________________
Leonard
79 VW rabbit diesel (ALH & 4motion )
04.5 rclb 4x4
01 & 03 VW Golf TDI
05 rcsb 2wd (in progress )
ROSKOE115: "It's ain't avatar material but I'd hit it!"
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10-08-2007, 01:27 PM
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#16
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Name: DangrousDuramax
Title: IPUFSMOK
Status: Not Here
Join Date: Aug 2007
Location: Houston, Tx
Member`s Gallery
Posts: 60
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Black smoke is a problem when you didnt add more fuel to make it happen or your turbo has a leak.
__________________
05 2500HD CC/SB, LT, 2WD, Black
AFE Stage II; E/J w/A; 4" MotoBlue straight pipe w/black stainless 5" mitre stack; EGR blocked; Amber DRL's; Rancho RS9000X's w/in-cab controller; Quad train horns; Black 20" KMC Rockstar's & Dune Grapplers
US Navy EOD (88-96) - Desert Storm vet
Last edited by DangrousDuramax; 10-08-2007 at 01:29 PM.
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10-08-2007, 01:31 PM
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#17
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Name: SKYNYRD
Title: "Drunkard"
Status: Not Here
Join Date: May 2007
Location: Harpers Ferry, WV
Member`s Gallery
Posts: 5,666
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question are you running a boost guage?
__________________
Leonard
79 VW rabbit diesel (ALH & 4motion )
04.5 rclb 4x4
01 & 03 VW Golf TDI
05 rcsb 2wd (in progress )
ROSKOE115: "It's ain't avatar material but I'd hit it!"
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10-08-2007, 01:39 PM
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#18
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Name: DangrousDuramax
Title: IPUFSMOK
Status: Not Here
Join Date: Aug 2007
Location: Houston, Tx
Member`s Gallery
Posts: 60
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Hauler, I just realized that you have a 380 code. Thats your issue right there. You possibly have the glow plug circuit "A" staying on.
__________________
05 2500HD CC/SB, LT, 2WD, Black
AFE Stage II; E/J w/A; 4" MotoBlue straight pipe w/black stainless 5" mitre stack; EGR blocked; Amber DRL's; Rancho RS9000X's w/in-cab controller; Quad train horns; Black 20" KMC Rockstar's & Dune Grapplers
US Navy EOD (88-96) - Desert Storm vet
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