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MarvinMarvin · 11-05-2010, 04:15 PM

Was at the lights today and noticed a diesel engine kinda noise.. thought it was the car next to me.

Next time i was stopped i could still hear the sound.. Its like a shuddering/vibrating sound similar to a diesel.. It only happens on idle, and kinda fades in and out.. sometimes its really loud..

As soon as i apply the gas the noise goes away completely and the engine sound normal.

Got it booked in for tuesday.. anyone know what it could be? Its a petrol e92

willhollin · 11-05-2010, 04:30 PM

Ask Tony.

dxb335d · 11-05-2010, 04:31 PM

What petrol E92?

MarvinMarvin · 11-05-2010, 04:38 PM

Quote:

Originally Posted by willhollin

Ask Tony.

pm sent.

MarvinMarvin · 11-05-2010, 04:39 PM

Quote:

Originally Posted by dxb335d

What petrol E92?

325

M3-FAST · 11-05-2010, 04:44 PM

sounds like the piezo injectors - dealer will probably report 'no fault found' - my 325i vert used to do it.

They are supposed to make that noise apparantly!

toxicnerve · 11-05-2010, 04:50 PM

You lot crack me up

MarvinMarvin · 11-05-2010, 05:02 PM

Quote:

Originally Posted by M3-FAST

sounds like the piezo injectors - dealer will probably report 'no fault found' - my 325i vert used to do it.

They are supposed to make that noise apparantly!

i really hope its not

M3-FAST · 11-05-2010, 05:29 PM

Quote:

Originally Posted by toxicnerve

You lot crack me up

??

M3-FAST · 11-10-2010, 07:17 AM

....so did they resolve the problem?

MarvinMarvin · 01-18-2011, 09:05 AM

I took it in and they told me it needed a software update (shock) which is pretty much their answer to everything.

The service advisor told me that they were going to raise the idle RPM to stop the noise from returning. I then said to her that raising the idle is just covering up the problem (because the noise stops when a tiny bit of gas is applied).

She then went on about how they do this to a lot of cars with the same problem, blah blah, and if it recurrs bring the car back again, so I just told her to do what she thinks is best.

I get the car back, and she says the noise has stopped etc. I notice that they havent raised the idle RPM, the needle sitting in the exact same position as before.

Two days later I hear the noise again. Now to take it back. And on top of that for some reason all my shortcut number keys for nav/radio/etc have been wiped off, and i cannot reprogram them for some reason.

JonnySi · 01-18-2011, 02:34 PM

The idle will be the same because it is not possible to adjust it. The noise is also a characteristic of direct injection petrol engines due to the high pressure of injection directly onto the piston crown.

briers · 01-18-2011, 02:52 PM

My dads new petrol merc sounds crap at idle too

Like Johnny said must just be the new high pressure fuel rail/pump combos they are using these days for fine tolerances.

The noise you describe is akin to my thoughts when hearing my dads car. I was going to tell him to ring them up about it but then i thought it must be the fuel tolerances and set up.

JonnySi · 01-18-2011, 04:13 PM

Its almost like a pinking sound, its terrible really, my mums 118i does the same, makes my Si seem smooth and quiet.

zltm089 · 01-18-2011, 05:17 PM

Quote:

Originally Posted by toxicnerve

You lot crack me up

E92westy · 01-18-2011, 06:53 PM

I had all new injectors in my 320i at one stage.
Drove it home it I thought 'great, drives good!', until I sat idling on the drive....
"WTF is that noise!!" says I, even getting out to listen to it.
Direct injection petrol engines can sound, errr, "crap" at idle.

MarvinMarvin · 01-19-2011, 12:58 AM

I know what you guys mean, on idle it doesnt sound great, but after 2 years theres this new noise - like something is loose and rattling in the engine and it makes thuds as it rattles (but its not particularly loud)

simples · 01-19-2011, 07:35 AM

Quote:

Originally Posted by MarvinMarvin

I know what you guys mean, on idle it doesnt sound great, but after 2 years theres this new noise - like something is loose and rattling in the engine and it makes thuds as it rattles (but its not particularly loud)

what dealer did u take it too? prehaps try another, i agree if a car has been fine for 2yrs then suddenly you start hearing strange noises, then it needs to be rectified. if all the same models are sounding that way from factory, than fine, but looks like this is not the case here. you never know may be an indicator of bigger problems to come??

MarvinMarvin · 01-20-2011, 01:27 PM

Quote:

Originally Posted by simples

what dealer did u take it too? prehaps try another, i agree if a car has been fine for 2yrs then suddenly you start hearing strange noises, then it needs to be rectified. if all the same models are sounding that way from factory, than fine, but looks like this is not the case here. you never know may be an indicator of bigger problems to come??

This is exactly my train of thought.. Warranty is expiring this coming September aswell.

I took it to Sytner Harold Wood in Essex, which, in my experience of three dealers are the best out of a pretty bad bunch.

11-05-2010, 04:15 PM	#1
MarvinMarvin Enlisted Member 6 Rep 38 Posts Drives: e92 Join Date: Mar 2010 Location: london iTrader: (0)	Help - Cars making a weird noise? Was at the lights today and noticed a diesel engine kinda noise.. thought it was the car next to me. Next time i was stopped i could still hear the sound.. Its like a shuddering/vibrating sound similar to a diesel.. It only happens on idle, and kinda fades in and out.. sometimes its really loud.. As soon as i apply the gas the noise goes away completely and the engine sound normal. Got it booked in for tuesday.. anyone know what it could be? Its a petrol e92
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11-05-2010, 04:30 PM	#2
willhollin Major General 275 Rep 9,914 Posts Drives: VW T5 Join Date: Apr 2008 Location: Worcestershire iTrader: (1) Garage List 2007 BMW E92 330d SE [10.00] 2010 Transporter T5 ... [0.00]	Ask Tony. __________________
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11-05-2010, 04:31 PM	#3
dxb335d The Tarmac Terrorist 1046 Rep 29,344 Posts Drives: 997.2 GT3 Join Date: Mar 2007 Location: ''Fandango Towers'' iTrader: (3) Garage List 2010 Porsche 997.2 GT3 [9.50] 2003 BMW E46 M3 [6.00] 2007 BMW E92 335D [5.50]	What petrol E92? __________________ 997.2 GT3
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11-05-2010, 04:44 PM	#6
M3-FAST Defected to the dark side..... 219 Rep 5,796 Posts Drives: BMW M5 LCi Join Date: May 2007 Location: Stafford, UK iTrader: (11) Garage List 2015 BMW M4 [0.00] 2009 E90 M3 [10.00] 2007 325i M-sport C ... [9.00]	sounds like the piezo injectors - dealer will probably report 'no fault found' - my 325i vert used to do it. They are supposed to make that noise apparantly!
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11-05-2010, 04:50 PM	#7
toxicnerve Colonel 101 Rep 2,834 Posts Drives: E92 335d M-Sport Join Date: Jul 2009 Location: UK iTrader: (2)	You lot crack me up
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11-10-2010, 07:17 AM	#10
M3-FAST Defected to the dark side..... 219 Rep 5,796 Posts Drives: BMW M5 LCi Join Date: May 2007 Location: Stafford, UK iTrader: (11) Garage List 2015 BMW M4 [0.00] 2009 E90 M3 [10.00] 2007 325i M-sport C ... [9.00]	....so did they resolve the problem?
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01-18-2011, 09:05 AM	#11
MarvinMarvin Enlisted Member 6 Rep 38 Posts Drives: e92 Join Date: Mar 2010 Location: london iTrader: (0)	I took it in and they told me it needed a software update (shock) which is pretty much their answer to everything. The service advisor told me that they were going to raise the idle RPM to stop the noise from returning. I then said to her that raising the idle is just covering up the problem (because the noise stops when a tiny bit of gas is applied). She then went on about how they do this to a lot of cars with the same problem, blah blah, and if it recurrs bring the car back again, so I just told her to do what she thinks is best. I get the car back, and she says the noise has stopped etc. I notice that they havent raised the idle RPM, the needle sitting in the exact same position as before. Two days later I hear the noise again. Now to take it back. And on top of that for some reason all my shortcut number keys for nav/radio/etc have been wiped off, and i cannot reprogram them for some reason.
	Appreciate 0 Quote

01-18-2011, 02:34 PM	#12
JonnySi BMW Technician 6 Rep 197 Posts Drives: BMW Join Date: Jun 2010 Location: England iTrader: (0)	The idle will be the same because it is not possible to adjust it. The noise is also a characteristic of direct injection petrol engines due to the high pressure of injection directly onto the piston crown.
	Appreciate 0 Quote

01-18-2011, 02:52 PM	#13
briers Ben 65 Rep 1,991 Posts Drives: Tesla p85d Join Date: May 2010 Location: Midlands,UK iTrader: (0)	My dads new petrol merc sounds crap at idle too Like Johnny said must just be the new high pressure fuel rail/pump combos they are using these days for fine tolerances. The noise you describe is akin to my thoughts when hearing my dads car. I was going to tell him to ring them up about it but then i thought it must be the fuel tolerances and set up.
	Appreciate 0 Quote

01-18-2011, 04:13 PM	#14
JonnySi BMW Technician 6 Rep 197 Posts Drives: BMW Join Date: Jun 2010 Location: England iTrader: (0)	Its almost like a pinking sound, its terrible really, my mums 118i does the same, makes my Si seem smooth and quiet.
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01-18-2011, 06:53 PM	#16
E92westy Lieutenant 37 Rep 549 Posts Drives: F20 118d Sport Join Date: Nov 2009 Location: Staffs. iTrader: (2)	I had all new injectors in my 320i at one stage. Drove it home it I thought 'great, drives good!', until I sat idling on the drive.... "WTF is that noise!!" says I, even getting out to listen to it. Direct injection petrol engines can sound, errr, "crap" at idle. __________________
	Appreciate 0 Quote

01-19-2011, 12:58 AM	#17
MarvinMarvin Enlisted Member 6 Rep 38 Posts Drives: e92 Join Date: Mar 2010 Location: london iTrader: (0)	I know what you guys mean, on idle it doesnt sound great, but after 2 years theres this new noise - like something is loose and rattling in the engine and it makes thuds as it rattles (but its not particularly loud)
	Appreciate 0 Quote