Bizarre noise. Is my car an alien?

SLH350 · 08-23-2016, 11:27 AM

Hard 1-2 pull WOT, lift off, bam this noise. Cold it doesn't do it, easy accel it doesn't do it. After a hard run it does it. Hit the accelerator and it stops. 5 minutes after the WOT run it fades and seems to go away. Please tell me this is a heat shield or something like that and not my hyperdrive or flux capacitor.

MShift · 08-23-2016, 03:52 PM

wtf is that?

Amirsm3 · 08-23-2016, 04:00 PM

Could be a bad ground or a crossed wire - or maybe you have a transformer that doesn't have enough life spark.

Kidding aside, I'm no electrician, but that sounds like you've got grounding issues - or something similar.

08-23-2016, 11:27 AM	#1
SLH350 Private 11 Rep 81 Posts Drives: '13 M3 Join Date: May 2009 Location: Pensacola, FL / CC, TX / Meridian, MS / Norfolk, VA iTrader: (0)	Bizarre noise. Is my car an alien? Hard 1-2 pull WOT, lift off, bam this noise. Cold it doesn't do it, easy accel it doesn't do it. After a hard run it does it. Hit the accelerator and it stops. 5 minutes after the WOT run it fades and seems to go away. Please tell me this is a heat shield or something like that and not my hyperdrive or flux capacitor.
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08-23-2016, 03:52 PM	#2
MShift OG 217 Rep 699 Posts Drives: MW '13 E92 Join Date: Mar 2008 Location: Miami iTrader: (3)	wtf is that?
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08-23-2016, 04:00 PM	#3
Amirsm3 Brigadier General 514 Rep 3,482 Posts Drives: 2011 Space Grey e90 M3 Join Date: Feb 2014 Location: Williams/Flagstaff, AZ iTrader: (3)	Could be a bad ground or a crossed wire - or maybe you have a transformer that doesn't have enough life spark. Kidding aside, I'm no electrician, but that sounds like you've got grounding issues - or something similar. __________________ 2011 e90 M3 Space Grey DCT ZCP- eAs, BMW Performance, Agency Power, Macht Schnell, iND, Milltek, Volk, Challenge, Stoptech, Ohlins BMWCCA:518970
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