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My BMW e46 330i makes a loud bang as it goes down

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  • 41 Answers

Need much more info. When you say goes down do you mean when it cuts off, when the motor slows to idle speed, when the car body "dips" after running over a bump? As I said need more details.

Posted on Jan 14, 2013

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6ya6ya
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Posted on Jan 02, 2017

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pjstanley
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SOURCE: loud banging at idle

check your pullys

Posted on Nov 22, 2008

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SOURCE: Passenger window makes loud noise when rolled down

On the inside trim, you can remove screws that are by the door handle, arm rest, under door and side of door and then gently pull back on the panel as there will also be retaining clips attached and you don't want to break them. You'll need to lift the door panel upwards in order to get it off the window ledge. Then you'll need to manipulate the panel and disconnect the door handle linkage from the door handle and disconnect the wiring for your controls. Pull back the weather seal and you should be able to see what the window is catching on.
I've seen cases where the lock cylinder comes loose and hits the window

Posted on Oct 07, 2009

  • 477 Answers

SOURCE: My 2001 Volkswagon Jetta makes a loud bang noise everytime I accelerate and I reached a certain point in the RPM meter

sounds to me like you have a misfire?

Posted on Sep 21, 2012

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2 Answers

Heard loud bang and now no power


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Apr 21, 2014 | 1992 Toyota Previa

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Free answers


zero answers. (my bag, even old , 60days.
fixed it,yet?
bang, !
my guess? is car was in park, started and was too rich(mostly normal)
and the exhaust has air leaks (very bad for many reasons)}
and you heard muffler explosion.
AIR (leaks in) plus excess fuel, nets you BOOM.

no MP3 audio so my best assessment. LOL
ok if the front of the CAT has air leaks this can cause
huge waste of fuel as the oxygen sensor goes quite nuts.
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Hi,
Are you able to tell me where the loud banging sound is coming from?
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Let me know and we can try to get a solution sorted for you.
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Not sure of the motor. Assume you are talking about a BMW E36 (325, 358, 318 etc.) What you are probably describing is a valve tap. Sort of a ticking sound not a bang bang bang right? If this is the case you need to have your valves adjusted. Not really a job for a weekend warrior but a search on the car forums may let you decide if this is a job you want to tackle.

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