W211 AMG Discuss the W211 AMG's such as the E55 and the E63

Issues with K&Ns???

Old Jan 28, 2010 | 07:32 PM
  #1  
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2005 Mercedes G55 AMG
Issues with K&Ns???

Ever since my leaking manifold was fixed, I installed the K&Ns again and have been driving without no CEL for two weeks now. I do have another problem now. Under light acceleration the car seems to bog between 2,000 and 3,000 rpm. Basically it goes, then bog, bog, bog, and goes again. At first I thought it was due to the increased airflow and that the car has to adapt, but this has been happening for over two weeks now. This never happened with the stock filters....

On the plus side, the car seems to respond and rev a tad better under hard acceleration!
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Old Jan 28, 2010 | 08:12 PM
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Have you reset you ECU? I would do that first before moving on. I have had KNNs on mine for some time now with absolutely no issues.
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Old Jan 28, 2010 | 08:29 PM
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2003 W211 E55, 2003 W220 S600
no issues with K&Ns
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Old Jan 28, 2010 | 10:34 PM
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55s don't have MAF, 63s do, well known issue with K&Ns
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Old Jan 28, 2010 | 11:56 PM
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From: el clinico magnifico
E63, S550
Forget the K&N, not worth the hassle for a few horsepower. You gain more power and definitely no CEL by removing the charcoal filters.
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Old Jan 29, 2010 | 01:12 AM
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The charcoals have been removed. I know the K&Ns are oily, but they sat in my garage, opened and in the dry for a month... Wouldn't most of the oil evaporate?
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Old Jan 29, 2010 | 03:54 AM
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2006 E55 AMG --old cars -- E39 M5, 2.7tt Audi S4, E36 M3 **Ducati 996, 748
what? where are these charcoal filters?
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Old Jan 29, 2010 | 03:56 AM
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Originally Posted by guysandiego
what? where are these charcoal filters?
E63 models only.
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Old Jan 29, 2010 | 04:30 AM
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oh ok --- no wonder i was clueless
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Old Jan 29, 2010 | 11:51 AM
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From: el clinico magnifico
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Originally Posted by ATKM5
The charcoals have been removed. I know the K&Ns are oily, but they sat in my garage, opened and in the dry for a month... Wouldn't most of the oil evaporate?
Apparently that's still not good enough. A lot of 6.2 owners who have the charcoals removed got a CEL after putting on the K&Ns.

Try:

1. Putting on the charcoals with the K&Ns; or

2. Putting on the stock filters without the charcoals.
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Old Jan 29, 2010 | 01:23 PM
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2004 W211 E55K, GL550
ive had K&N in my 210 E55 & my 211E55K and have never had any type of issues i know if u clean them i recommand u clean them and don't use the oil if any at all. I know there have been issues with the oils causing damage to the MAF sensors. Other then that i would say they are great filters.
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Old Jan 29, 2010 | 04:39 PM
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That's weird man, I would put the stock ones back in and see if the problem still persists. I remember reading something similar to your problem happening in a E63. I would get the dealer to look at it sounds like probably the TB or MAF?
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