Help with this error !
Thread Starter
Senior Member
Joined: Aug 2008
Posts: 272
Likes: 1
From: South Africa
2008 C63 AMG
Help with this error !
I have been getting this error come up everyone now and again.
Seems to be more frequent. Does not affect power.
Anyone have a ideas as to what it may be?
Thanks
Seems to be more frequent. Does not affect power.
Anyone have a ideas as to what it may be?
Thanks
Thread Starter
Senior Member
Joined: Aug 2008
Posts: 272
Likes: 1
From: South Africa
2008 C63 AMG
UPDATE
Took the car to the dealeship.
They confirm that the fuel rail pressure sensor is broken.
Currently in default mode which means it is running constant
5 bar pressure.
This error has been here for almost a year.
What would constant bar pressure affect?
Took the car to the dealeship.
They confirm that the fuel rail pressure sensor is broken.
Currently in default mode which means it is running constant
5 bar pressure.
This error has been here for almost a year.
What would constant bar pressure affect?
MBWorld Fanatic!
Joined: Feb 2010
Posts: 5,655
Likes: 484
2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
The engine might be running a little rich. The injectors will be expecting a certain amount of msec open time at x pressure and getting the same time at 5 bar (72.5 psi). This might force more fuel through the injector in the allotted open time of the injector. Since the pressure sensor is broken it defaults to max pressure so as not to create a lean situation and potential detonation. It doesn't sound like it has a major impact on the tune or you would probably know it from sluggish performance, lots of black smoke out the tail pipe or really black and fuzzy tips. Ours already seem to be black enough as it is. It is the fuel pressure that determines how much fuel is pushed through an injector for any given amount of time that it is open.
Thread Starter
Senior Member
Joined: Aug 2008
Posts: 272
Likes: 1
From: South Africa
2008 C63 AMG
Thanks for that info.
I thought that the fuel pressure might have a taken a bit on strain running those pressure for so long but the technician at the dealership said that the pump is rated for 8 bar so it should be fine.
I habe noticed a lot of black an the tail pipes an the car has been extremely heavy on gas.
I thought that the fuel pressure might have a taken a bit on strain running those pressure for so long but the technician at the dealership said that the pump is rated for 8 bar so it should be fine.
I habe noticed a lot of black an the tail pipes an the car has been extremely heavy on gas.
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MBWorld Fanatic!
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2017 Mini Cooper S Clubman ALL4 - British Racing Green
Sorry to raise a dead thread.. Anyways, I just got the same problem, except I am having the opposite effect (at least if you believe the mileage gauge), my regular commute puts me around 20 to 22mpg, this morning it showed 24 and some change.
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