M113 V8 Kompressor Platform Technical discussion relating to models sharing the M113 V8 5.5L Kompressor. Including SL55 AMG, CL55 AMG, S55 AMG, E55 AMG, CLS55 AMG, G55 AMG, SLR (M155).
Sponsored by:
Sponsored by:

Misfire under WOT Help diagnosing

Old 01-04-2017, 07:44 PM
Thread Starter
Join Date: Dec 2008
Location: San Diego, CA
Posts: 201
Thanks: 0
Thanked 2 Times in 2 Posts
W202 C55 (5.4 swapped C43)
Misfire under WOT Help diagnosing

Hey guys picked up a 2005 CL 55 AMG, only issue is that it Misfires under WOT, if I drive normally there no misfires no CEL and car drives effortlessly, but If I stand on it about 4k rpm is starts to pop and misfire, ive hooked it up to my friends STAR tool and it said there was a misfire on cylinder 1 and 2 so I replaced both coil packs, its better but still misfiring under WOT, any ideas? thinking plugs and wires next.

Thanks for the help
AMG__Dom is offline  
Old 01-04-2017, 08:49 PM
MBWorld Fanatic!
Rocman8's Avatar
Join Date: Nov 2014
Posts: 1,134
Thanked 67 Times in 63 Posts
2006 E55, 2005 C55, 2005 E320 Estate Sport, 2015 ML350
sounds like you are on the right track. plugs for sure and you can swap the wires too for diagnosis purposes.
Rocman8 is offline  
Old 02-02-2017, 04:55 PM
Join Date: Feb 2012
Location: Lynden Washington
Posts: 201
Thanked 20 Times in 18 Posts
'08 S-65
I am also having a misfire at WOT in my E-55.

Cylinder #4. Swapped coils for different cylinders. Gave it a coil, 16 plugs, wires... No change.

Fixed vacuum leaks at plenum box for passenger side and did the rest of intake gaskets as the supercharger was off.

Injector has same resistance as the other cylinders. 26.5 ohms if failing memory serves.

Have not swapped injectors with another cylinder. Worth the effort? Idles and runs well aside from WOT.

May have seen a change once while wiggling engine wiring harness. Not certain and am unable to duplicate that.

Are any of you aware of a pattern failure in engine harness or ECU?

JohnLane is offline  
Old 04-30-2018, 09:41 PM
MBWorld Fanatic!
E55Greasemonkey's Avatar
Join Date: Jul 2012
Posts: 1,636
Thanked 36 Times in 29 Posts
2004 E55
wrong thread

Last edited by E55Greasemonkey; 04-30-2018 at 09:44 PM.
E55Greasemonkey is offline  
Old 05-31-2018, 08:06 PM
Join Date: Jan 2016
Location: Quebec
Posts: 82
Thanks: 0
Thanked 2 Times in 2 Posts
BMW M3 E90 / BMW E39 M5 /BMW E46 M3 / E55 AMG W211
Wrong thread too, sorry
lockeed is offline  

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:

Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: