Pre-ignition and CEL
Thread Starter
Senior Member
Joined: Feb 2011
Posts: 366
Likes: 11
From: Australia
E63S
Pre-ignition and CEL
Would pre-ignition ie pinging routinely trigger a CEL? Or would I have to run a diagnostic check and look for fault codes to pick up this sort of problem??
The reason I ask is that I have a stock P31 ie no tune and have noticed what sounds to me very much like pinging under acceleration. It seems to be most noticeable for a brief period at relatively low rpm then settles as revs increase. No obvious loss of performance. I thought it might have been due to a bad batch of fuel when I first heard it but have refuelled several times since with several different fuel companies (all 98 RON) and still hearing it.
The reason I ask is that I have a stock P31 ie no tune and have noticed what sounds to me very much like pinging under acceleration. It seems to be most noticeable for a brief period at relatively low rpm then settles as revs increase. No obvious loss of performance. I thought it might have been due to a bad batch of fuel when I first heard it but have refuelled several times since with several different fuel companies (all 98 RON) and still hearing it.
MBWorld Fanatic!
Joined: Jun 2012
Posts: 1,744
Likes: 8
From: Sydney, Australia
2010 C63 Estate
i hear a similar noise too, in similar circumstance, but i hear it more in a tunnel, or when near a concrete barrier, as the noise echoes off that, and if the driers window is open, it can be heard.
I have always said i will record it.
I have always said i will record it.
Senior Member
Joined: Feb 2012
Posts: 322
Likes: 1
From: Nigeria
2012 C63 Coupe P31 CF Trim - Eurocharged V7, 2012 RangeRover Autobiography, 2017 GLS 63 Amg
i hear pings constantly in my C63 and if u live in nigeria, am sure u wont mind as our fuel maybe RON 50 , it pings so bad that its a way of life, octane boosters do little to help.
once in a while we get good fuel and the car doesn't ping at all under any load......
once in a while we get good fuel and the car doesn't ping at all under any load......
