Engine Pinging

M5DAL · Sep 28, 2009

I have been using a BP fuel (Ultimate 98 RON). I have tried a few different fuel stations and have noticed a bit of pinging under load up hills. I tried a bottle of octane boost and I did not detect any pinging after putting it in.

i just wonder if the fuel is as its supposed to be. The M5 should not ping even on 95 RON.

Anyone else suffer from pinging?

Cheers

M5DAL · Sep 29, 2009

anyone?

BTW we have just had a big story break here that we are being ripped off by oil companies on the price of premium fu

M6Cabrio · Sep 29, 2009

Is that 98 octane??? We run 93-91 octane here. So no, something is wrong if you have that high of a grade and it is pinging. Try a different station to see if you are getting ripped off. I would assume though that the grading stardards of fuel may be different between AUS and USA?? Not sure.

usmcrebel · Jul 7, 2010

93 oct is 98 ron....America had to be different you know Inchs to centimeters kinda thing. just a different way of figuring the same problem.

ideliver · Sep 29, 2009

the rest of the world uses a different standard than the US for octane...in the states many people feel that BP gas is not the best...btw...how much ethanol do you run down under??

unfoundhorsepower · Sep 29, 2009

It's not the GAS....it might be a knock sensor.....???

M5DAL · Oct 1, 2009

normal 91 octane is 5% Ethanol (not all stations)

We can buy 98 with up to 10% ethanol. i try not to buy that.

we only have Shell, BP and a few independents.

The beast is in for a service on the 15th. Knock sensor will be on the list.

thnks!

gasterus · Oct 2, 2009

i'm running 95 octane fuel with no pinging

unfoundhorsepower · Oct 3, 2009

M5DAL said:
I have been using a BP fuel (Ultimate 98 RON). I have tried a few different fuel stations and have noticed a bit of pinging under load up hills. I tried a bottle of octane boost and I did not detect any pinging after putting it in.

i just wonder if the fuel is as its supposed to be. The M5 should not ping even on 95 RON.

Anyone else suffer from pinging?

Cheers

Did you find the trouble of the "pinging"??:byee55amg

M5DAL · Oct 3, 2009

The car is in for a service on the 15th. We will see what they do. i think it might be a knock sensor as its using a lot of fuel as well and i drive carefully.

Cheers

DriveWFO · Oct 3, 2009

My neighbor is having the same problem with his new M3. Is your car throwing an error code?

M5DAL · Jul 7, 2010

Well its just started again.Was ok for a while after the clutch but since then its got worse. Dealers has NFI idea - claimes its not happening. I reckon its Ultimate 98 and i am trying other 98 fuels....

i am not convinced BP 98 is 98....

Cheers

M5 VTEN · Jul 7, 2010

I will also do the same and try other fuel. Which ones do you think? Caltex, Shell? I am going to dealer on Friday will ask their opinion. Mine seems to do it around 4000 rpm especially when under load going up hill.
By the way the photos you sent look great. Thanks again

Ahmed · Jul 7, 2010

WTF is the point of knock sensors if your car is gonna ping?

ekorre · Jul 7, 2010

ive heard it ping before up hill full throttle. its distinct, not very loud though, I know it from my turbo audi days when I used to actually measure that crap.

I dont have any codes or warnings however. I doubt it would be fruitful to try and get the dealer to do anything ever as it is very elusive.

I havent been able to recreate it, maybe it is fuel dependent.

i think it maybe more common than many think, its just not that noticeable unless the windows are down and you know what sound to look for, its not pinging continuously or even for a long enough duration for me to really notice it. In fact I havent heard it for awhile now and its warm out.

Ahmed · Jul 7, 2010

I don't think the M5 "pings at all"

My ECU is tuned for 98 Octane RON ( 93 US standard ), and I run on 95 RON ( 91 US standard ) on a regular basis... NO pinging whatsoever! Loss of power? YES! But not pinging or detonating!

Our cars have knock sensors, they will re-tard timing upon sensing detonation!

usmcrebel · Jul 7, 2010

a lot of people think that injectors are pinging, i know under a heavy load before my exhaust on my mustang you could hear the injectors firing.

iam5 · Jan 5, 2012

Sorry to bring back this thread ,But did any of you guys found out what the "pinging" issue was . Im having same issue with my 06 m5. Any help would greatly appriciated.

allmotor_2000 · Jan 5, 2012

The S85 doesn't have 'knock' sensors - it uses the ionic sense on the spark plugs to detect detonation/pre-ignition per cylinder. The pinging could be bad spark plugs, injectors (as someone mentioned)... if there is excessive detonation where you can audibly hear pinging, a CEL should turn on.

jfin · Jan 5, 2012

I noticed pinging on and off and start using chevron for 2 months and it stopped

MIGHTY5 · Jan 5, 2012

it is a fuel related problem if it wasnt i believe you would have an error code.

MIGHTY5 · Jan 6, 2012

how many miles do yuo have on your car?

hoverid · Mar 3, 2012

I also have pinging problem with my S85, under load. Its gone if I add octane booster additives in my fuel. Running out of ideas on how to fix it, except using that octane booster constantly. Its interesting that the same fuel does not give me problems in my S54 engine.

335xi · Mar 3, 2012

LIke others said, our cars use the spark plugs to sense detonation. If you had excessive detonation where you actually feel it, the car would have thrown the check engine light or even go into limp mode.

gjs · Mar 29, 2012

Funny no one has tried changing out the spark plugs, as essentially these are our knock sensors... Mine is pinging too and after a little thought I could not understand why the ecu was not retarding. As I can get it to ping constantly. But if the ecu is not realising the ping then it will not do sh$%.

So I am changing out the spark plugs and will report back to let you know what happens...

tbrown1985 · Mar 30, 2012

I have the same condition. I thought plugs might be the cause so I changed them - no improvement. Also, I notice mine will only make the noise if the car is fully warmed up. Even if only slightly under temp, I can be at almost full throttle, and no noise whatsoever. And then, it only does it under load. Sounds like pinging or rattling. Really confused. No codes, no nothing. Hope someone has some luck figuring this one out.

tbrown1985 · Mar 30, 2012

Oh. I've changed fuel, octane booster, Techron, etc. All have no effect. Once the engine is fully warmed up - after about 10 minutes of driving it will start to ping or rattle under load. Even with very minimal throttle input. Won't do it revving in idle at all.

gjs · Mar 30, 2012

Ok this is not what I wanted to hear. However i'm sure I will get to the bottom of my pinging..... Hopefully. Tell me more so even with octane booster still no joy?

Also what tests have you guys done other than check codes?

Also what is the mileage on your cars? Lets figure this out as it is really p£%sing me off. If our cars are knocking standard, imagine what would happen with a tunehmmm

bluewater · Apr 1, 2012

I had pinging and the cause was a slipping clutch. Apparently under load the clutch slipped slightly. The system detected low power (to the wheels) and was advancing the timing to try and make up for it. The only detectable slipping was a clutch chatter just off the line, but we determined that it was slipping slightly at acceleration.
It was a trick diagnosis but after new clutch. No more ping
This was after I messed around with different gasolines. BMW calls for using top tier gasolines, they list the brands.

Engine Pinging

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