Loud Bang - BMW Forum - BimmerWerkz.com
3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

 
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#1 (permalink) Old 07-07-2005, 11:51 AM
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I was sitting at a stop light yesterday and when the light turned green, I started to go and i heard a loud bang. It was so loud that I though I got rear ended. It wasn't a sound like the engine backfiring but it sounded like it came from under me as if something slipped when the power went to the rear wheels. Anyone have any idea what it might have been. I have a 2000 323 ci / manual tranny if that helps.

Thanks in advance for any input.

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#2 (permalink) Old 07-07-2005, 03:10 PM
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do you have cold air intake? they do this sometimes.
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#3 (permalink) Old 07-07-2005, 03:45 PM
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Quote:
Originally posted by peterkulesza@Jul 7 2005, 03:10 PM
do you have cold air intake? they do this sometimes.
[snapback]360421[/snapback]
No I don't but I was thinking it might be the throttle body. It happened to my buddy's 7 series and it was the throttle body. However, his is an auto and it only happened to him around 85 mph so I am still kinda puzzled.

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#4 (permalink) Old 07-07-2005, 06:09 PM
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is your car still running???
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#5 (permalink) Old 07-07-2005, 11:09 PM
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Quote:
Originally posted by 2001BMW325xi@Jul 7 2005, 06:09 PM
is your car still running???
[snapback]360505[/snapback]
yeah it only happened that one time and it has run fine since

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#6 (permalink) Old 07-08-2005, 03:54 AM
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Happened to my Pulsar/Sunny GTi once, i thought the car blew a tyre... but it was only gas that had got into the exhaust and then the car backfired and it blew flames from the exhaust.. i was frightened that i had broken something :S

| BMW E36 325i | BMW E34 520i | BMW E39 "M5" | BMW E60 530d MAPPED | BMW E38 740iA | BMW E32 750iAL |

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#7 (permalink) Old 07-10-2005, 02:21 AM
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My car did the same thing, I was going in reverse coming out of my driveway. I thought I blew out a tire or something, I have no Idea what it was and it hasn't done it since and the car runs fine.
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#8 (permalink) Old 07-19-2005, 11:59 AM
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The same thing happened to me two times in the last week.
I think its tranny related...its like you are accelerating slowly then you press a little harder and you hear a bang.
I turned around both times thinking I got rear-ended too.
The car is fine otherwise...I think its just the tranny taking a mis-step, I am not worried...The stealership will not be seeing me anytime soon.
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#9 (permalink) Old 08-10-2005, 09:27 PM
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Take it too the dealer and have hem check the carrier berring on the drive shaft. Sometimes they work them selves loose. and sometimes its just a sporadic thing. But it sometimes under load torques and hits the floor board.
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#10 (permalink) Old 09-03-2005, 03:28 PM
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I just checked with Gene Krantz at mission control and he confirms that it was a burst helium disk...perfectly normal and nothing to worry about.
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