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Hi all, first off I'd like to say yes I've searched, and this forum has provided lots of useful info in the past, but can't find the answer to my specific problem this time, and secondly I WILL PROMISE to update you all when I finally find the faults that is bugging the life out of me so that it helps anyone else with the same issue in future...
Now My Problem, please help if you can:- The car is a stock 2017 C63 AMG with roughly 20k miles. I recently noticed that cylinders 1, 2, 3, 4 from bank 1 misfires.
I started by replacing the all spark plugs for all 8 cylinders, ignition coils and eventually Fuel injector (nozzle), i took off the air cleaners, disconnected the o2 sensors, it still complained misfires from the same bank 1....
When I drove it, to my surprise it drives well till I push it above 5000rpm, I got back the shaking got worse and put an icarsoft MBII scanner on it, and it showed the following codes:-
'Random Misfire'
'Misfire Cylinder 1 Detected'
'Misfire Cylinder 2 Detected'
'Misfire Cylinder 4 Detected'
'Misfire Cylinder 3 Detected'
Please note, all of these misfires are on bank 1 only (the right hand bank).
Since the fault only occured on the right hand bank, I decided to swap everything (in stages) i.e. Fuel injectors, coil packs, etc from right to left , to see if the fault moves, but the fault is STILL on the right hand bank.
Below is a list of things I have tried so far, and I am at a complete loss, so if you can come up with any help, it would be greatly appreciated:-
1) New spark plugs
2) Fuel Injectors swapped from between bank 1 and bank 2
3) Coil packs swapped from between bank 1 and bank 2
4) Ran car with Mass Air Meters and 02 sensor disconnected, made no difference I am out of ideas at this point.
Hi all, first off I'd like to say yes I've searched, and this forum has provided lots of useful info in the past, but can't find the answer to my specific problem this time, and secondly I WILL PROMISE to update you all when I finally find the faults that is bugging the life out of me so that it helps anyone else with the same issue in future...
Now My Problem, please help if you can:- The car is a stock 2017 C63 AMG with roughly 20k miles. I recently noticed that cylinders 1, 2, 3, 4 from bank 1 misfires.
I started by replacing the all spark plugs for all 8 cylinders, ignition coils and eventually Fuel injector (nozzle), i took off the air cleaners, disconnected the o2 sensors, it still complained misfires from the same bank 1....
When I drove it, to my surprise it drives well till I push it above 5000rpm, I got back the shaking got worse and put an icarsoft MBII scanner on it, and it showed the following codes:-
'Random Misfire'
'Misfire Cylinder 1 Detected'
'Misfire Cylinder 2 Detected'
'Misfire Cylinder 4 Detected'
'Misfire Cylinder 3 Detected'
Please note, all of these misfires are on bank 1 only (the right hand bank).
Since the fault only occured on the right hand bank, I decided to swap everything (in stages) i.e. Fuel injectors, coil packs, etc from right to left , to see if the fault moves, but the fault is STILL on the right hand bank.
Below is a list of things I have tried so far, and I am at a complete loss, so if you can come up with any help, it would be greatly appreciated:-
1) New spark plugs
2) Fuel Injectors swapped from between bank 1 and bank 2
3) Coil packs swapped from between bank 1 and bank 2
4) Ran car with Mass Air Meters and 02 sensor disconnected, made no difference I am out of ideas at this point.
You can just look at the high pressure fuel pump of bank 1 but in this case you should have a DTC code of fuel pressure so i don't think its related to fuelling
Just had my 2020 C63S Coupe in the shop recently for a misfire on cylinder 7 and it was a faulty fuel injector.
Since yours is misfiring randomly on the right bank then I would check out these Service Bulletins that they used to troubleshoot my car.
Good luck
do you know if these are geared towards M177 in general or specific model years? Couldn't find that info in the docs you attached but thinking if its generally for M177 then it might be a good idea to save them in case my car ever sees that issue. thanks
I would like to see logs of boost vs rpm vs fuel injector duty vs ignition timing vs knock vs fuel trims vs calculated airflow,. Bank to bank. Apparently your left bank is ok so comparing values may give some insight on what could be happening
It would also be worthwhile to do a boost leak test, both with high pressure air 20+ psi and a smoke test too. Most smoke maxhines are low pressure for evap systems.
Usually higher rpm only misfires are boost/fuel related.
You said this only happens at 5k rpm.
And based on what you've said you've kind of ruled out the fuel part
By moving what you did you eliminated a lot of stuff, but I wouldn't have done that without logging the car first. Sometimes moving stuff can cause more issues if you don't know what you're doing
The MAP sensors in the intercoolers are known to give issues at high temps sometimes, you could try swapping those left to right. However as I said before, monitoring them while driving will save that hassle.
I suspect comparing bank 1-2 will show something, but I prefer not to guess at it.
do you know if these are geared towards M177 in general or specific model years? Couldn't find that info in the docs you attached but thinking if its generally for M177 then it might be a good idea to save them in case my car ever sees that issue. thanks
Yes the first document at the top states it is for: C63/GTx 177/178
Hi all, first off I'd like to say yes I've searched, and this forum has provided lots of useful info in the past, but can't find the answer to my specific problem this time, and secondly I WILL PROMISE to update you all when I finally find the faults that is bugging the life out of me so that it helps anyone else with the same issue in future...
Now My Problem, please help if you can:- The car is a stock 2017 C63 AMG with roughly 20k miles. I recently noticed that cylinders 1, 2, 3, 4 from bank 1 misfires.
I started by replacing the all spark plugs for all 8 cylinders, ignition coils and eventually Fuel injector (nozzle), i took off the air cleaners, disconnected the o2 sensors, it still complained misfires from the same bank 1....
When I drove it, to my surprise it drives well till I push it above 5000rpm, I got back the shaking got worse and put an icarsoft MBII scanner on it, and it showed the following codes:-
'Random Misfire'
'Misfire Cylinder 1 Detected'
'Misfire Cylinder 2 Detected'
'Misfire Cylinder 4 Detected'
'Misfire Cylinder 3 Detected'
Please note, all of these misfires are on bank 1 only (the right hand bank).
Since the fault only occured on the right hand bank, I decided to swap everything (in stages) i.e. Fuel injectors, coil packs, etc from right to left , to see if the fault moves, but the fault is STILL on the right hand bank.
Below is a list of things I have tried so far, and I am at a complete loss, so if you can come up with any help, it would be greatly appreciated:-
1) New spark plugs
2) Fuel Injectors swapped from between bank 1 and bank 2
3) Coil packs swapped from between bank 1 and bank 2
4) Ran car with Mass Air Meters and 02 sensor disconnected, made no difference I am out of ideas at this point.
Thanks in advance for your help.
interesting they’re only 1-4 misfires. I had an identical issue but it was evap/purge valve solenoid. I had misfires only past 5500rpm regardless of the gear/ load. Worth checking. It’s the two valves near the headlight under the hood. If it’s excessively loud it’s worth replacing. Otherwise look at fuel trims, fuel rail pressure, 02 sensors, HPFP, AFR, and boost to start. You swapped the coil packs from 1234 to 5678? And same with injectors?
interesting they’re only 1-4 misfires. I had an identical issue but it was evap/purge valve solenoid. I had misfires only past 5500rpm regardless of the gear/ load. Worth checking. It’s the two valves near the headlight under the hood. If it’s excessively loud it’s worth replacing. Otherwise look at fuel trims, fuel rail pressure, 02 sensors, HPFP, AFR, and boost to start. You swapped the coil packs from 1234 to 5678? And same with injectors?
yes I swapped coil and fuel injector from bank 1 to 2 and still experience misfires from bank 1
Hi, sorry it’s been a while I updated this thread. After trying so many things I’m left with this error codes At the top I have a “P008792” error code and I don’t know what exactly I’m to do. I don’t want to throw parts at it. Is anyone familiar with this code?
You need XENTRY, or someone who has it. Display of a code does not give sufficient information.
XENTRY allows you to see all current values of sensors and actuators, temperatures, pressures, etc. While idling and while driving. It's the dealer level diagnostic system.
Take it to a dealer or indy who can do a quick test and who will dig into the fuel and engine ECUs in XENTRY. It will cost you an hour or two of Dx time.
It's odd that you are having bank 1 misfires but the oxygen sensors with the codes are on bank 2. I still think it's possible that you're having a fuel delivery issue with bank 1 given the fuel pressure code, and some other issue going on with the O2 sensor.
I would agree with the above and take it to a dealer or independent shop that can do a deeper dive into the systems to diagnose the issue.
Last edited by SJGetsome; Aug 8, 2022 at 01:11 AM.
I’m having cylinder 5 and random cylinder misfire codes with heavy load (boost). I replaced all the plugs, but not the coils. Would coils cause misfiring only at high load though? Rpm doesn’t seem to matter, just boost. At this point it seems like it could be anything—fuel, boost leak, ignition coil and so on. Any help is appreciated. I just purchased this car and am feeling a bit discouraged.
I’m having cylinder 5 and random cylinder misfire codes with heavy load (boost). I replaced all the plugs, but not the coils. Would coils cause misfiring only at high load though? Rpm doesn’t seem to matter, just boost. At this point it seems like it could be anything—fuel, boost leak, ignition coil and so on. Any help is appreciated. I just purchased this car and am feeling a bit discouraged.
Thank you
are you tuned? sometimes the tunes can force be too lean and cause misfires, you need to lower timing
Last edited by miamiboy; May 10, 2023 at 01:31 AM.
Hi all, first off I'd like to say yes I've searched, and this forum has provided lots of useful info in the past, but can't find the answer to my specific problem this time, and secondly I WILL PROMISE to update you all when I finally find the faults that is bugging the life out of me so that it helps anyone else with the same issue in future...
Now My Problem, please help if you can:- The car is a stock 2017 C63 AMG with roughly 20k miles. I recently noticed that cylinders 1, 2, 3, 4 from bank 1 misfires.
I started by replacing the all spark plugs for all 8 cylinders, ignition coils and eventually Fuel injector (nozzle), i took off the air cleaners, disconnected the o2 sensors, it still complained misfires from the same bank 1....
When I drove it, to my surprise it drives well till I push it above 5000rpm, I got back the shaking got worse and put an icarsoft MBII scanner on it, and it showed the following codes:-
'Random Misfire'
'Misfire Cylinder 1 Detected'
'Misfire Cylinder 2 Detected'
'Misfire Cylinder 4 Detected'
'Misfire Cylinder 3 Detected'
Please note, all of these misfires are on bank 1 only (the right hand bank).
Since the fault only occured on the right hand bank, I decided to swap everything (in stages) i.e. Fuel injectors, coil packs, etc from right to left , to see if the fault moves, but the fault is STILL on the right hand bank.
Below is a list of things I have tried so far, and I am at a complete loss, so if you can come up with any help, it would be greatly appreciated:-
1) New spark plugs
2) Fuel Injectors swapped from between bank 1 and bank 2
3) Coil packs swapped from between bank 1 and bank 2
4) Ran car with Mass Air Meters and 02 sensor disconnected, made no difference I am out of ideas at this point.
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