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      10-13-2014, 11:42 PM   #1
drdave
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Engine wheezing when floored

Hi everyone. I'm loving my M4 so far. I've had it nearly two months now. I've got a question. When I floor the car and it hits about 4000 rpms, there is a wheezing sound coming from the engine. The car is plenty warmed up.
Is this normal? It sounds like something is loose, there's a hole in something, etc... Could be the turbos as I have no idea what they are supposed to sound like as this is the first car I've owned with them. Anyone else notice this sound? Normal?

Thanks!
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      10-13-2014, 11:47 PM   #2
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Sounds like a boost leak.

Bring it to the dealer
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      10-14-2014, 12:42 AM   #3
kitw
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There was a service action that was supposed to be done on all the US cars in order to make sure the boost hose didn't come off - check to see that it was done on your's. Should have been done as part of the new car prep.
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      10-14-2014, 12:53 AM   #4
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Quote:
Originally Posted by kitw
There was a service action that was supposed to be done on all the US cars in order to make sure the boost hose didn't come off - check to see that it was done on your's. Should have been done as part of the new car prep.
Where exactly is this boost hose? I heard a LOUD popping noise on the freeway the other day (such as when a hose pops off, I used to have a N54 335i) got super freaked out and pulled off the freeway and found....nothing? Lol. I don't hear anything different or feel any shaky rmps either : checked all around the car too didn't seem as if I hit anything either.
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      10-14-2014, 01:04 AM   #5
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could just be the turbos spooling they're pretty loud
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      10-14-2014, 05:30 AM   #6
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Agree with it's either A.) Normal turbo noise which you said you aren't used to which I would describe as a lower pitched whooshing noise. or B.) A boost leak which I would describe as a higher pitched whistling noise.
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