C63s misfiring on bank 1
12-07-2023, 10:07 PM
#1
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2018 c63s
C63s misfiring on bank 1
C63s misfiring on cylinders 1-4, mods are downpipes and tune, already swapped coils and plugs between banks with no difference.
Only codes are the misfiring for all of bank 1, cold start seems fine for a few seconds then idle drops down and cel flashing and you can feel the misfiring and roughness on my scanner showing only for that bank. When I rev it, the motor seems to run a bit smoother but roughness doesn’t go away. Checked compression and all the numbers were good and didn’t vary much between cylinders, before I waste time swapping injectors between banks anyone have any other ideas what could be causing it?
Logging fuel pressure match up between banks and are what spec is for idle. Not sure what else besides injectors, but find it hard to believe all 4 would go out at the same time.
Only codes are the misfiring for all of bank 1, cold start seems fine for a few seconds then idle drops down and cel flashing and you can feel the misfiring and roughness on my scanner showing only for that bank. When I rev it, the motor seems to run a bit smoother but roughness doesn’t go away. Checked compression and all the numbers were good and didn’t vary much between cylinders, before I waste time swapping injectors between banks anyone have any other ideas what could be causing it?
Logging fuel pressure match up between banks and are what spec is for idle. Not sure what else besides injectors, but find it hard to believe all 4 would go out at the same time.
12-08-2023, 10:18 AM
#2
Senior Member
C63s misfiring on cylinders 1-4, mods are downpipes and tune, already swapped coils and plugs between banks with no difference.
Only codes are the misfiring for all of bank 1, cold start seems fine for a few seconds then idle drops down and cel flashing and you can feel the misfiring and roughness on my scanner showing only for that bank. When I rev it, the motor seems to run a bit smoother but roughness doesn’t go away. Checked compression and all the numbers were good and didn’t vary much between cylinders, before I waste time swapping injectors between banks anyone have any other ideas what could be causing it?
Logging fuel pressure match up between banks and are what spec is for idle. Not sure what else besides injectors, but find it hard to believe all 4 would go out at the same time.
Only codes are the misfiring for all of bank 1, cold start seems fine for a few seconds then idle drops down and cel flashing and you can feel the misfiring and roughness on my scanner showing only for that bank. When I rev it, the motor seems to run a bit smoother but roughness doesn’t go away. Checked compression and all the numbers were good and didn’t vary much between cylinders, before I waste time swapping injectors between banks anyone have any other ideas what could be causing it?
Logging fuel pressure match up between banks and are what spec is for idle. Not sure what else besides injectors, but find it hard to believe all 4 would go out at the same time.
12-10-2023, 12:36 AM
#3
Junior Member
C63s misfiring on cylinders 1-4, mods are downpipes and tune, already swapped coils and plugs between banks with no difference.
Only codes are the misfiring for all of bank 1, cold start seems fine for a few seconds then idle drops down and cel flashing and you can feel the misfiring and roughness on my scanner showing only for that bank. When I rev it, the motor seems to run a bit smoother but roughness doesn’t go away. Checked compression and all the numbers were good and didn’t vary much between cylinders, before I waste time swapping injectors between banks anyone have any other ideas what could be causing it?
Logging fuel pressure match up between banks and are what spec is for idle. Not sure what else besides injectors, but find it hard to believe all 4 would go out at the same time.
Only codes are the misfiring for all of bank 1, cold start seems fine for a few seconds then idle drops down and cel flashing and you can feel the misfiring and roughness on my scanner showing only for that bank. When I rev it, the motor seems to run a bit smoother but roughness doesn’t go away. Checked compression and all the numbers were good and didn’t vary much between cylinders, before I waste time swapping injectors between banks anyone have any other ideas what could be causing it?
Logging fuel pressure match up between banks and are what spec is for idle. Not sure what else besides injectors, but find it hard to believe all 4 would go out at the same time.
If your at 5 years over 30k miles be proactive unlike I was. Change the above items your def not alone in these issues.
