GL 320 CDI smoke
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GL 320 CDI
GL 320 CDI smoke
The GL is brand new. Less then one year. From the same beginning it smokes with black smoke during acceleration. The chrome finishing pipes of the exhaust are already black (I am washing them with acid each week.) I took it several time to the dealer about this problem. They are saying that their test do not detect any problem. I really do not know what to do. Anybody had the same problem?
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From: NW corner of CONUS
2008 GL 320 CDI, 2004 VW V10 Touareg TDI
It absolutely should NOT smoke, AT ALL! With 45000 mi on my '08 - 320 there is NO blackening of even the INSIDE of the exhaust pipe. Something is wrong with the amount of fuel being fed during acceleration: ie too much fuel or too little turbo compression to provide enough air to burn. The fuel map in the ECU should be reading the turbo compression and feeding just the right amount of fuel to burn cleanly. It is obviously providing too much fuel.
If there is another dealer near you, ask them to test to make sure the fuel maps are responding correctly. Since there is smoke where there should be none, the problem is also an emissions compliance issue. If necessary, try to get the attention of your state or federal emissions folks. Federal requirements are that the parts affecting emissions must be warrantied for 100,000 mi.
If there is another dealer near you, ask them to test to make sure the fuel maps are responding correctly. Since there is smoke where there should be none, the problem is also an emissions compliance issue. If necessary, try to get the attention of your state or federal emissions folks. Federal requirements are that the parts affecting emissions must be warrantied for 100,000 mi.
Last edited by Fourdiesel; Aug 20, 2010 at 06:16 PM.
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2011 GL350 Bluetec, Irridium over Black Leather
It absolutely should NOT smoke, AT ALL! With 45000 mi on my '08 - 320 there is NO blackening of even the INSIDE of the exhaust pipe. Something is wrong with the amount of fuel being fed during acceleration: ie too much fuel or too little turbo compression to provide enough air to burn.
Ask me how I know.
- Mark <-- ex-owner, 2002 Duramax diesel with faulty injectors
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GL 320 CDI
It absolutely should NOT smoke, AT ALL! With 45000 mi on my '08 - 320 there is NO blackening of even the INSIDE of the exhaust pipe. Something is wrong with the amount of fuel being fed during acceleration: ie too much fuel or too little turbo compression to provide enough air to burn. The fuel map in the ECU should be reading the turbo compression and feeding just the right amount of fuel to burn cleanly. It is obviously providing too much fuel.
If there is another dealer near you, ask them to test to make sure the fuel maps are responding correctly. Since there is smoke where there should be none, the problem is also an emissions compliance issue. If necessary, try to get the attention of your state or federal emissions folks. Federal requirements are that the parts affecting emissions must be warrantied for 100,000 mi.
If there is another dealer near you, ask them to test to make sure the fuel maps are responding correctly. Since there is smoke where there should be none, the problem is also an emissions compliance issue. If necessary, try to get the attention of your state or federal emissions folks. Federal requirements are that the parts affecting emissions must be warrantied for 100,000 mi.
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From: Georgia, USA
2008 GL320 CDI, 2007 E320, 2005 Passat TDI
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From: NW corner of CONUS
2008 GL 320 CDI, 2004 VW V10 Touareg TDI
Your experience is very different from mine then. EVERY diesel I have owned since 1974 (and I have not owned a gasser since then) has produced black inside the exhaust except my Mercedes. My TDI produced black smoke on strong acceleration because it has been 'tuned' or remapped to deliver the max fuel possible through the non stock Bosio injectors. My Kubota diesel lawn mower produces black smoke when there is too much fuel and my Deere 490D makes black smoke under heavy load when the injector pump is pushing max fuel. White smoke can be from coolant leaks.
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2011 GL350 Bluetec, Irridium over Black Leather
Your experience is very different from mine then. EVERY diesel I have owned since 1974 (and I have not owned a gasser since then) has produced black inside the exhaust except my Mercedes. My TDI produced black smoke on strong acceleration because it has been 'tuned' or remapped to deliver the max fuel possible through the non stock Bosio injectors. My Kubota diesel lawn mower produces black smoke when there is too much fuel and my Deere 490D makes black smoke under heavy load when the injector pump is pushing max fuel. White smoke can be from coolant leaks.
Black particulate smoke is from a rich mixture that's resulting in unburned fuel exiting the tailpipe.
The white smoke I saw on my D-max was from mass quantities of fuel flowing into the cylinders from eroded injector ball seats. LOTS of fuel, so it's kind of like the effect you get when you pour water on a charcoal grill.
Either case - not good.
- Mark
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From: DFW
2022 E350 Diamond White Metallic, 2016 GLC300 Dakota Brown Metallic
My 320cdi has 25,000 miles on it. NO smoke or dirty pipes
. My Jetta tdi on the other hand which does not have a particulate trap does leave some nastiness on the rear bumper
.
. My Jetta tdi on the other hand which does not have a particulate trap does leave some nastiness on the rear bumper.
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'10 CL550, '12 GL550
VW wasn't ready and that's why they sold no diesels in USA from 2007-2009.
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From: NW corner of CONUS
2008 GL 320 CDI, 2004 VW V10 Touareg TDI
In the situation you describe I can see how white smoke from vaporized and unburned fuel might appear. I had not experienced that - fortunately!
