Mysterious Cylinder Misfire
Junior Member
Joined: May 2020
Posts: 27
Likes: 0
From: Virginia
2009 Sl550, 2009 335d, 2005 Corvette C6, 2017 Armada, 2023 Santa Fe
Yea it is a odd issue. I changed my plugs and coil for #8. I only throw a code when I hit about 6k RPM. Have not checked compression for that cylinder yet, but will soon.
Last edited by Adrian052; Jul 18, 2020 at 12:38 PM.
Newbie
Joined: Oct 2020
Posts: 1
Likes: 0
R230 SL500
Any news in this thread?
Seems that a lot of people are having issues with the mysterious single cylinder misfire on the M113. (M113.964)
In my case i struggle with the fault code P2058 (Cylinder 8 misfire), and the P2050 (General misfire fault code). It only happens under heavy load, high RPM. The ECU is performing a cylinder shutoff and the engine starts shaking. CEL ON. Ignition off engine restart, everything is fine until next time heavy load is applied, it happens every time. Under normal driving conditions it never happens.
Ignition coil/cables, injector is swapped with other cylinders. Catalytic converters are "knock-tested" and checked with endoscope without finding any problems. Compression test and cylinder leakage test OK. Left valve cover removed and visually inspected rocker arms and valve springs, without finding any obvious problems. Valve seats and cylinder 8 is visually inspected with endoscope without finding any problems.
I have seen somebody mentioning a defective injector driver inside the ECU itself. This seems unlikely, but not impossible? Any experiences is appreciated!
Thanks
Seems that a lot of people are having issues with the mysterious single cylinder misfire on the M113. (M113.964)
In my case i struggle with the fault code P2058 (Cylinder 8 misfire), and the P2050 (General misfire fault code). It only happens under heavy load, high RPM. The ECU is performing a cylinder shutoff and the engine starts shaking. CEL ON. Ignition off engine restart, everything is fine until next time heavy load is applied, it happens every time. Under normal driving conditions it never happens.
Ignition coil/cables, injector is swapped with other cylinders. Catalytic converters are "knock-tested" and checked with endoscope without finding any problems. Compression test and cylinder leakage test OK. Left valve cover removed and visually inspected rocker arms and valve springs, without finding any obvious problems. Valve seats and cylinder 8 is visually inspected with endoscope without finding any problems.
I have seen somebody mentioning a defective injector driver inside the ECU itself. This seems unlikely, but not impossible? Any experiences is appreciated!
Thanks
Member
Joined: Apr 2017
Posts: 86
Likes: 7
From: New Zealand
C55 Wagon Midnight Blue, SL55 Brilliant Silver, E55 Designo Mystic White
after recent oil change my sl55 started smoking white on startup, and my heart sank. mechanic told me to buy coils and plugs for #8, fixed. i think either old cat below it was getting too hot and may be reason they fail there, and/or the bad coil emissions have stressed it, because is smelly now
Junior Member
Joined: Jan 2021
Posts: 15
Likes: 1
From: Cheshire UK
W220 S500 2000 2014 C220CDI
I am now having the same problems with my 2001 S500.In the UK we don't need the active cylinder control, most specialists tell the car it isn't fitted and that sorts it.I had a gearbox service done and when it came back after start fuel consumption showed 26.5mpg.Before the gearbox service it showed 13.9 on startup.I asked my "specialist" if he had turned it on by mistake, he had never heard of ACC.If you watch a series of videos by number 27 on you tube you will see what he had done.
Junior Member
Joined: Apr 2009
Posts: 53
Likes: 3
From: San Diego, CA
06 S430
Any updates on your M113 misfires? I've had a damn cyl 3 and 4 random misfire just above 4k rpms that is driving me crazy. I've done everything but the fuel pump which I just ordered. It's a Hella, hope it's quality. Thanks.
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Joined: May 2017
Posts: 2,290
Likes: 434
C320
Junior Member
Joined: Mar 2010
Posts: 26
Likes: 4
From: Las Vegas
CLK 55 AMG,88 124,96 sl500,06 ML350, 2007 CL600, 2015 Sprinter 3500.
I had the same thing going on #3 cyl misfire 2006 M113 eng . I tried everything spent tons of money . What fixed it was the electrical connector going to the coil I replaced them problem gone! They Ohm out good going all the way to the ME computer so it must have been a loose connection , basically just worn out where it plugs into the coil. BTW I soldered them on to assure a good connection.
Newbie
Joined: Jun 2023
Posts: 1
Likes: 0
From: Sweden
E55
I had the same thing going on #3 cyl misfire 2006 M113 eng . I tried everything spent tons of money . What fixed it was the electrical connector going to the coil I replaced them problem gone! They Ohm out good going all the way to the ME computer so it must have been a loose connection , basically just worn out where it plugs into the coil. BTW I soldered them on to assure a good connection.
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Newbie
Joined: Jan 2024
Posts: 1
Likes: 0
03 mercedes e320
03 e320
I have a 03 e320 driving fine then parked for the night after a monsoon of a rain went out noticed light on in interior battery dead after I jumped it car started misfiring and check engine light came on this is the first time it has ever done this now I have changed the fuel pump and bought a new battery and still nothing when it does idle and I give it gas it stalls please help please anybody
o and yeah misfire on cylinder 4 5 and 6 all ove night after a dead battery
o and yeah misfire on cylinder 4 5 and 6 all ove night after a dead battery
Last edited by blaxknose; Jan 8, 2024 at 06:33 AM.
Newbie
Joined: Oct 2023
Posts: 2
Likes: 0
Mercedes W211 E500 2004
Any news in this thread?
Seems that a lot of people are having issues with the mysterious single cylinder misfire on the M113. (M113.964)
In my case i struggle with the fault code P2058 (Cylinder 8 misfire), and the P2050 (General misfire fault code). It only happens under heavy load, high RPM. The ECU is performing a cylinder shutoff and the engine starts shaking. CEL ON. Ignition off engine restart, everything is fine until next time heavy load is applied, it happens every time. Under normal driving conditions it never happens.
Ignition coil/cables, injector is swapped with other cylinders. Catalytic converters are "knock-tested" and checked with endoscope without finding any problems. Compression test and cylinder leakage test OK. Left valve cover removed and visually inspected rocker arms and valve springs, without finding any obvious problems. Valve seats and cylinder 8 is visually inspected with endoscope without finding any problems.
I have seen somebody mentioning a defective injector driver inside the ECU itself. This seems unlikely, but not impossible? Any experiences is appreciated!
Thanks
Seems that a lot of people are having issues with the mysterious single cylinder misfire on the M113. (M113.964)
In my case i struggle with the fault code P2058 (Cylinder 8 misfire), and the P2050 (General misfire fault code). It only happens under heavy load, high RPM. The ECU is performing a cylinder shutoff and the engine starts shaking. CEL ON. Ignition off engine restart, everything is fine until next time heavy load is applied, it happens every time. Under normal driving conditions it never happens.
Ignition coil/cables, injector is swapped with other cylinders. Catalytic converters are "knock-tested" and checked with endoscope without finding any problems. Compression test and cylinder leakage test OK. Left valve cover removed and visually inspected rocker arms and valve springs, without finding any obvious problems. Valve seats and cylinder 8 is visually inspected with endoscope without finding any problems.
I have seen somebody mentioning a defective injector driver inside the ECU itself. This seems unlikely, but not impossible? Any experiences is appreciated!
Thanks
DTC P2050, P2058
Thank you very much for any help.
Member
Joined: Feb 2017
Posts: 248
Likes: 36
From: L.A., Moscow, NYC, San Diego, Baja
1998 E320 Wagon, 2003 W211 E500, 2003 W211 E500, 1999 W210 E55 AMG
If it helps...getting the P0300 general misfire and rough idle and running. Boning up on Smooth Running Live Data. This apparently can isolate the cylinder and afterwhich test data from O2 sensors, their voltage and heater, coils, ignition wires, plugs and their gap, MAF pressure, CPS...did I miss anything?
Newbie
Joined: Sep 2025
Posts: 3
Likes: 0
i have 2003 w211 e320 (m112.949 ) i have multiple misfire codes p300 p301 p304 p305 over 4-5k rpm car goes misfire mode cuts off some of the cylinders spark plugs coils o2 sensor cats changed but i cant found what is the problem
Out Of Control!!
Joined: Apr 2019
Posts: 12,058
Likes: 6,857
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
PREDICTABLE IGNITION TIMINGS
You have multiple misfires at 4500.Rpm
Note at the root of combustion you need a stable ignition system:
-- ALL cylinders need more than ok parts.
-- They need identical ignition parts: plugs & coils must be identical. This affects cyl. timings (never mind indexing).
Upstream sensors were money well spent
This being multiple cyl. check your fuel rail pressure remains stanle across Rpm.
