Strange noise coming from under the hood

MrSlickk · 11-21-2014, 03:02 PM

I have this strange noise coming from under my hood after I lock my car and I have no idea what it is.

Found this clip online and sound is identical

Running JB4 on Map 1 also

Nguyenhu0106 · 11-21-2014, 04:42 PM

I believe it's the low pressure fuel pump priming.
happens when you unlock your car or open your doors or trunk... it primes to prepare for you to start your car.

MrSlickk · 11-21-2014, 11:30 PM

Quote:

Originally Posted by Nguyenhu0106

I believe it's the low pressure fuel pump priming.
happens when you unlock your car or open your doors or trunk... it primes to prepare for you to start your car.

But this happens after I lock it not when I unlock it...

GB-335xiCoupe · 11-22-2014, 07:04 AM

Agreed, sounds like a pump priming. BUT, it shouldn't take that long. Could it be something clearing the lines or a reservoir as a preventative measure of some sort?

OP, does it do this every time, regardless of ambient air temp and engine temp? My N55 makes noise too, but not like that...

pits200 · 11-22-2014, 07:06 AM

You have a procede? If so it is one of the connectors.

GB-335xiCoupe · 11-22-2014, 07:08 AM

Quote:

Originally Posted by pits200

You have a procede? If so it is one of the connectors.

His signature indicates a JB4.

MrSlickk · 11-22-2014, 11:21 AM

Quote:

Originally Posted by GB-335xiCoupe

Agreed, sounds like a pump priming. BUT, it shouldn't take that long. Could it be something clearing the lines or a reservoir as a preventative measure of some sort?

OP, does it do this every time, regardless of ambient air temp and engine temp? My N55 makes noise too, but not like that...

You know now that I think of it, it started happening the same night my engine oil light turned on... I did put oil it in it but I haven't had a chance to go out for a drive, will update tonight if the sound is still there or not!

MrSlickk · 11-22-2014, 11:22 AM

Quote:

Originally Posted by pits200

You have a procede? If so it is one of the connectors.

Yes running jb4 on map 1

MrSlickk · 11-22-2014, 11:48 PM

Okay so my engine oil is okay, But I still have the sound whenever its measuring and I can only hear it outside when i lock the car the sound goes away about 2-3 seconds after. Should I make a trip to BMW?

GB-335xiCoupe · 11-23-2014, 07:46 AM

Quote:

Originally Posted by itsalert

Okay so my engine oil is okay, But I still have the sound whenever its measuring and I can only hear it outside when i lock the car the sound goes away about 2-3 seconds after. Should I make a trip to BMW?

If it were me, I would never take it to a BMW dealer again. Exceptions being: safety/defect recalls.

Personally, I would:
1) Research as much as possible on the internet. If you find multiple sources indicating the same issue, follow that. You shouldn't go in a particular direction based solely on one post or advice from one person.
2) Find an indie who specializes in foreign cars / BMWs. They can have VERY reasonable labor hours, and will often give you good sound advice for free.
3) As a LAST resort, go to the BMW dealership. The dealerships are highly overrated and overly expensive. Plus, in my experience, are not as knowledgeable as your standard DIY guy.

In your case, take the engine cover off and the acoustic cover off, and see if you can better pinpoint the source of the sound. Could be the water pump, could be the fuel pump, who knows. Is it making the noise while the engine is running as well as when it's not running?

Do you think the car has been running any differently? You indicate it started happening after the oil light came on. Have you changed your oil lately?

3s4u2 · 11-23-2014, 09:44 AM

Possibly the water pump!

Monster900 · 11-23-2014, 10:07 AM

Quote:

Originally Posted by 3s4u2

Possibly the water pump!

+1

MrSlickk · 11-23-2014, 11:35 AM

I'm still under warranty and I do have extended warranty as well, so it looks like a trip to BMW is going to be the way to go. It's just strange because I think the sound only happens when it's measuring the oil level haven't had enough time to pinpoint it exactly

MrSlickk · 11-25-2014, 12:26 AM

Okay so its been fine the past 2 days, Now it says engine oil low again.. But there are no leaks from under the car either. Looks like its time for a dealership visit

MrSlickk · 11-27-2014, 12:33 PM

Hey, Which connector on the JB4 would it be? I took it to my mechanic at BMW who used to for LTMW and he changed the oil sensor and everything and said its possibly the tune causing it

Quote:

Originally Posted by pits200

You have a procede? If so it is one of the connectors.

pits200 · 11-27-2014, 12:39 PM

I have a procede and I think it was on the bigger left connector. I think the gray smaller subconnector. On the procede there is a three way connector that came loose on mine and made the sound you have.

pits200 · 11-27-2014, 12:40 PM

VIDEO0083:

Take off tune and I bet the sound stops.

MrSlickk · 11-27-2014, 01:07 PM

Yeah I am going to take it off. Thank you

Quote:

Originally Posted by pits200

VIDEO0083:

Take off tune and I bet the sound stops.

MrSlickk · 01-11-2015, 08:40 PM

Okay, So I took the JB4 and the car his been running fine for over 2 weeks now, No strange sounds, No low engine oil. Now what do I do? Should I try reinstalling the tune? I messaged Burger and they said the JB4 wouldnt cause that problem in the beginning

11-21-2014, 03:02 PM	#1
MrSlickk Captain 396 Rep 735 Posts Drives: F80 M3 Join Date: Jul 2014 Location: Los Angeles iTrader: (0)	Strange noise coming from under the hood I have this strange noise coming from under my hood after I lock my car and I have no idea what it is. Found this clip online and sound is identical Running JB4 on Map 1 also __________________ Current: 6MT F80 M3: KW V3 Coilovers \| Savini Wheels \| PSM Style Diffuser \| CS Style Front Lip Old: N55 E92
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11-21-2014, 04:42 PM	#2
Nguyenhu0106 Private First Class 27 Rep 199 Posts Drives: 2007 335i Join Date: Dec 2012 Location: Chicago, il iTrader: (1)	I believe it's the low pressure fuel pump priming. happens when you unlock your car or open your doors or trunk... it primes to prepare for you to start your car.
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11-22-2014, 07:04 AM	#4
GB-335xiCoupe Libertarian 132 Rep 1,577 Posts Drives: 29k mi per year. Join Date: Sep 2013 Location: Green Bay area iTrader: (0)	Agreed, sounds like a pump priming. BUT, it shouldn't take that long. Could it be something clearing the lines or a reservoir as a preventative measure of some sort? OP, does it do this every time, regardless of ambient air temp and engine temp? My N55 makes noise too, but not like that... __________________ 2011 335xi Coupe BSM (e92/N55/ZPP/ZCW, Alpina B3 Flash) Bought 08/09/2013@53,340mi Current 3/13/2019@206,283mi Fail(s): tstat hous/water pump 89k, Chargepipe 106k, coolant tank 114k, FRM3 114k Maint: Walnut blast 101k, Trans/T-case Fluid 103k, OFHG 195k
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11-22-2014, 07:06 AM	#5
pits200 Colonel 547 Rep 2,590 Posts Drives: 09 335i X-Drive Black Sapphire Join Date: Mar 2010 Location: Pittsburgh iTrader: (1)	You have a procede? If so it is one of the connectors.
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11-22-2014, 11:48 PM	#9
MrSlickk Captain 396 Rep 735 Posts Drives: F80 M3 Join Date: Jul 2014 Location: Los Angeles iTrader: (0)	Okay so my engine oil is okay, But I still have the sound whenever its measuring and I can only hear it outside when i lock the car the sound goes away about 2-3 seconds after. Should I make a trip to BMW? __________________ Current: 6MT F80 M3: KW V3 Coilovers \| Savini Wheels \| PSM Style Diffuser \| CS Style Front Lip Old: N55 E92
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11-23-2014, 09:44 AM	#11
3s4u2 Beamer Mantic 82 Rep 1,191 Posts Drives: 2006 325i Prem Join Date: Apr 2008 Location: Texas iTrader: (0)	Possibly the water pump! __________________ 2006 325i 2006 M5 2008 X5 4.8i 2014 X5 50i M-Pkg
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11-23-2014, 11:35 AM	#13
MrSlickk Captain 396 Rep 735 Posts Drives: F80 M3 Join Date: Jul 2014 Location: Los Angeles iTrader: (0)	I'm still under warranty and I do have extended warranty as well, so it looks like a trip to BMW is going to be the way to go. It's just strange because I think the sound only happens when it's measuring the oil level haven't had enough time to pinpoint it exactly __________________ Current: 6MT F80 M3: KW V3 Coilovers \| Savini Wheels \| PSM Style Diffuser \| CS Style Front Lip Old: N55 E92
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11-25-2014, 12:26 AM	#14
MrSlickk Captain 396 Rep 735 Posts Drives: F80 M3 Join Date: Jul 2014 Location: Los Angeles iTrader: (0)	Okay so its been fine the past 2 days, Now it says engine oil low again.. But there are no leaks from under the car either. Looks like its time for a dealership visit __________________ Current: 6MT F80 M3: KW V3 Coilovers \| Savini Wheels \| PSM Style Diffuser \| CS Style Front Lip Old: N55 E92
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11-27-2014, 12:39 PM	#16
pits200 Colonel 547 Rep 2,590 Posts Drives: 09 335i X-Drive Black Sapphire Join Date: Mar 2010 Location: Pittsburgh iTrader: (1)	I have a procede and I think it was on the bigger left connector. I think the gray smaller subconnector. On the procede there is a three way connector that came loose on mine and made the sound you have.
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11-27-2014, 12:40 PM	#17
pits200 Colonel 547 Rep 2,590 Posts Drives: 09 335i X-Drive Black Sapphire Join Date: Mar 2010 Location: Pittsburgh iTrader: (1)	VIDEO0083: Take off tune and I bet the sound stops.
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01-11-2015, 08:40 PM	#19
MrSlickk Captain 396 Rep 735 Posts Drives: F80 M3 Join Date: Jul 2014 Location: Los Angeles iTrader: (0)	Okay, So I took the JB4 and the car his been running fine for over 2 weeks now, No strange sounds, No low engine oil. Now what do I do? Should I try reinstalling the tune? I messaged Burger and they said the JB4 wouldnt cause that problem in the beginning __________________ Current: 6MT F80 M3: KW V3 Coilovers \| Savini Wheels \| PSM Style Diffuser \| CS Style Front Lip Old: N55 E92
	Appreciate 0 Quote