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Old 03-06-2009, 02:56 AM
Registered User
Join Date: Dec 2003
Posts: 154
2004 s600 biturbo misfire

greetings all.

I have an amg sport '04 s600. I just bought it and I have a running issue with it.

The car only seems to want to run on the passenger side bank. I pulled the igniter with the intention of replacing all 24 plugs, but found the passenger side igniter to have a date code of 12/08, so decided to leave that one alone.

The driver's side igniter is original to the car. I pulled it, no arc spots visible, replaced plugs with latest and greatest $14 plugs, new boots, reinstalled..and misfire..

Plugged it up at the dealership and short test revealed the following-

p2033 -comparison of the pressures between components b28/6 (pressure sensor upstream of throttle valve), B28/7 (pressure sensor downstream of throttle valve) and sensor "ambient pressure" in control module n3/10 (me-sfi {ME} control unit). The ambient pressure is measured by a pressure sensor in control module n3/10.

p20f3 - n 92/2 (eci ignition module left bank of cylinders (PO300)

P20FA - Spark plug a or b of cylinder eight or ignition module left bank of cylinders

I noticed a "rotten egg" smell from the cats when driving the car on the highway intermittantly. It wasn't strong but I did get a wiff of it. Was wondering if one of the cats was bad due to the car being driven like this? Wouldn't the ME shut down the whole bank?

Anyway, the car is gutless, running on six i'm guessing. It gets codes for misfire on 7,8, and 9. The last non-turbo v12 I had , suffered a similar symptom but it turned out to be bad 02 sensors that were making the bank run super rich due to improbable signal.

Also I have an issue with the "pre-safe" system throwing a shoe due to code
B106B- Signal supplied by control module left front reversible emergency tensioning retractor or right etr, has an invalid value.

Any ideas on the issues? I heard these cars were brutally fast, but can get this one out of its own way. Any insight would be appreciated, PS when I took the plugs out, they all looked great, no fouling, or carbon..

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Old 03-06-2009, 11:36 PM
clm's Avatar
clm clm is offline
Join Date: Oct 2008
Location: Austin TX
Posts: 76
It sound like you need the other ignition control module. Honestly though- I dont mean to be a jerk, but you really ought to let the guys at the dealer take care of the issues. I have worked on enough of these cars and engines to understand that the complexity and expense of these engines is no were near a diy's level.
These are unbelievely fast cars- wicked fast and smooth as silk. You do have to pay for it though. If you cannot afford to take it to the dealer, then I would recommned getting rid of it because it is not going to get any cheaper!
Again -dont mean to be a jerk , but I am tring to be real with you.
Good luck though.
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Old 03-07-2009, 01:34 AM
Registered User
Join Date: Dec 2003
Posts: 154
i like challenges...

Endulge me; anyone want to tell me what the p2033 code is ?
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Old 03-07-2009, 08:29 AM
Hirnbeiss's Avatar
ich fahre, also bin ich
Join Date: Mar 2002
Location: South Florida
Posts: 1,671
I would get the cats checked first. If restricted, the backpressure from them might be then causing the misfire and other pressure code. If it's under 80K it's still under emissions warranty.

I'd eliminate that as a cause before looking at the coil or intake related components. The 2033 measures pressure-drop across the throttle body.

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