Multiple misfires at startup
Thread Starter
Senior Member
Joined: Feb 2005
Posts: 254
Likes: 17
From: America
CL600 2003
Multiple misfires at startup
This morning start my 2003 cl600 and feel a bad vibration, check engine light is on, and smells like bad combustion...
never had had any of these symptoms before, engine ran perfectly, restarted and same thing
here are codes
p0300
p0307
p0311
p0309
p0312
p0308
p0310
p0153
Ok, so it’s drivers side bank, and oxygen sensor in cat (I think)
So, what do you guys think, coil pack? Voltage transformer, or simply the oxygen sensor ( I’m not that lucky lol)
this happens right away at startup, instantly. Parked the car it was fine, next day at startup instant misfires
thanks
never had had any of these symptoms before, engine ran perfectly, restarted and same thing
here are codes
p0300
p0307
p0311
p0309
p0312
p0308
p0310
p0153
Ok, so it’s drivers side bank, and oxygen sensor in cat (I think)
So, what do you guys think, coil pack? Voltage transformer, or simply the oxygen sensor ( I’m not that lucky lol)
this happens right away at startup, instantly. Parked the car it was fine, next day at startup instant misfires
thanks
Thread Starter
Senior Member
Joined: Feb 2005
Posts: 254
Likes: 17
From: America
CL600 2003
Thanks for the reply,
I filled the tank to 3/4 4 days prior, and the morning of the problem I was at 1/4. Car ran fine during all this period, even under hard acceleration.
So i don’t think it’s the fuel
I filled the tank to 3/4 4 days prior, and the morning of the problem I was at 1/4. Car ran fine during all this period, even under hard acceleration.
So i don’t think it’s the fuel
Super Member
Joined: Apr 2015
Posts: 604
Likes: 51
LS400
How about the weather in the area? If you are down south and are experiencing lots of rain and humidity that could contribute to the problem. In older cars it was a huge issue with the ignition systems of the day.
Thread Starter
Senior Member
Joined: Feb 2005
Posts: 254
Likes: 17
From: America
CL600 2003
I tried to contact V12icpack to rent a voltage transformer for testing, but haven’t had any reply, does anyone know if they are still in business?
Edit----Got in touch with V12icpack, ordered a voltage transformer, I'll fallow up when I install the part
Edit----Got in touch with V12icpack, ordered a voltage transformer, I'll fallow up when I install the part
Last edited by slonar21; May 12, 2019 at 01:19 PM.
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,254
Likes: 171
2002 CL500 to CL55 conversion
sounds like a failing fuel pump or clogged filter. fuel problems will trigger tons of codes all of the sudden that seem otherwise unexplainable. my dad always said it best, motors need three things to run - air, spark and fuel. start with the basics IMO
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Thread Starter
Senior Member
Joined: Feb 2005
Posts: 254
Likes: 17
From: America
CL600 2003
Today I received the voltage transformer, installed it but problem persists
So I will drop it off at the dealership, can anyone tell me if I can drive without causing any damage even though only 6 of 12 cylinders work?
So I will drop it off at the dealership, can anyone tell me if I can drive without causing any damage even though only 6 of 12 cylinders work?
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MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,254
Likes: 171
2002 CL500 to CL55 conversion
one may argue mercedes already implemented a cylinder deactivation feature on these cars in the past
on the other hand, basic engine mechanics suggest “dry” firing a cylinder is not good for it
