S-Class (W220) 1999-2006: S 320 CDI, S 320, S430, S 500, S 600

S600 - DAS Help, Constant Misfire on Cylinder 6

Old Feb 13, 2013 | 07:30 AM
  #1  
rxr2012's Avatar
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S600
S600 - DAS Help, Constant Misfire on Cylinder 6

She was running fine and swapped out the plugs, during which Indy noticed leak from valve cover gaskets ,that was replaced as well. 50% of plugs had some oil around it, the burn area was clear. Some background on this is that, once every 600 to 700 miles, i will get a check engine and it will fix itself, 1, 3 & 7 misfire.

Now after plugs, head gasket and cleaner looking heads, i have a constant misfire on bank6, P300 and P306.

>>Idles rough. I have the DAS ( Star Diag ) working and need help to eliminate O2 Sensor, MAF or other sensors, before i blame the coil pack.

Need some help on what menu functions to go thru in DAS , other than running the QuickTest, also if there are expected values on certain sensors, i would like to
measure those and post as well.

2003 with 75K Miles.

Appreciate all help in troubleshooting this.
thanks
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Old Feb 13, 2013 | 02:54 PM
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From: Ipswich
vw golf gttdi
hi,to check for misfire you can go into actual value and check smooth engine running,if coil 6 faulty swap over to another bank.
or you can go into acutations-t1 coil shutoff(something like that) and you can shut off leads a/b-max value= +5.
make sure that oxygen sensors are plugged into correct bank!
also go into adaptations,reset mixture adaptation.
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Old Feb 13, 2013 | 02:56 PM
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From: Ipswich
vw golf gttdi
and when you say head gasket do you mean rocker cover?
perform compression test also.
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Old Feb 13, 2013 | 03:09 PM
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rxr2012's Avatar
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S600
thanks - yes i meant the rocker covers.., head gaskets will be a long job won't it. ,

When you say , swap over to other BANK, can you do this using the DAS ?
If so, what options will get me there from the menu.
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