My car is makes a whistle noice when I press throttle

[m5touringfan]

its a 2003 BMW e39 525it

it only does it with light throttling it sounds like a little whistle you can only hear it with the widows down or no music. is this normal or something that needs fixing

[kosta]

+1 my acura does that too
i'm curious now

[allamer35]

sounds like the NOTORIOUS CCV or vacuum leaks of some sort

[Aristeros]

its a 2003 BMW e39 525it

it only does it with light throttling it sounds like a little whistle you can only hear it with the widows down or no music. is this normal or something that needs fixing

Intake Boot ..... do a search on it..... theres an elbow that comes off the throttle body with another smaller elbow attached to it. Pop your hood and feel the back side of the smaller elbow and you'll feel tears in it. Replace it for 25 bucks after shipping and no more whistle.

[GSA1]

happened to me. check the intake bellows at the throttle body. the rubber "ribs" will have slits/ tears at the bend letting the air in and making a whistling noise. gl

EDIT: ARISTEROS BEAT ME TO THE ANSWER BY A MINUTE...LOL

[johnnybgood]

Look for a large hot thing that looks like two snails mating. It will have tube out both ends and be hot as hell. that is your turbo and they all whistle!!!

[joako]

Intake Boot ..... do a search on it..... theres an elbow that comes off the throttle body with another smaller elbow attached to it. Pop your hood and feel the back side of the smaller elbow and you'll feel tears in it. Replace it for 25 bucks after shipping and no more whistle.

There are TWO rubber hoses there. Confirm which one you need! If it's the right one you can do intake muffler delete "for free" if you are so inclined.

[m5touringfan]

Johnnybgood im not on joke time and if you where smart you would know there is no e39 with a turbo that joke would only be funny if it had one



thanks for the answers everyone I will check tomorrow or sometime this weekend and get back with what it was

[Doc325i]

There's detailed instructions on inspecting the intake boot in this thread:

http://forums.bimmerforums.com/forum...cv+bimmerfiver

[BimmerBreaker]

Johnnybgood im not on joke time and if you where smart you would know there is no e39 with a turbo that joke would only be funny if it had one



thanks for the answers everyone I will check tomorrow or sometime this weekend and get back with what it was

Well technically some E39s in europe got a turbo...

Its a vacuum leak though. Its some hose or somewhere in the intake tract.

[bigm77]

could vacuum leaks increase the whistle/WHINEING sound with the RPM?

[BimmerBreaker]

could vacuum leaks increase the whistle/WHINEING sound with the RPM?

Yes

[Brewtech]

Turbonator... If you can hear it, it means its working.

[m5touringfan]

well I thought about the turbo diesels this morning and thought I hope no one mentions the euro turbo e39's

[Aristeros]

well I thought about the turbo diesels this morning and thought I hope no one mentions the euro turbo e39's

There has also been e39's fitted with a turbo non euro turbo diesel

[Touring E39]

There has also been e39's fitted with a turbo non euro turbo diesel

And non stock. 530d's are Beast's.

[m5touringfan]

well the joke would be irrelevant if its a non stock turbo I would have to know the sound it makes. I put it there

[Doc325i]

its a 2003 BMW e39 525it

it only does it with light throttling it sounds like a little whistle you can only hear it with the widows down or no music. is this normal or something that needs fixing

How'd you make out, did you check the boot? Is your whistling noise solved?

[m5touringfan]

I checked today and it sounds like a leaf is in there too. I hear the noise in the vacuum but I don't see a hole. I will have to open to do further investigation I had my sister pump the throttle and I clearly hear it but couldn't feel a hole

[gtxragtop]

Intake Boot ..... do a search on it..... theres an elbow that comes off the throttle body with another smaller elbow attached to it. Pop your hood and feel the back side of the smaller elbow and you'll feel tears in it. Replace it for 25 bucks after shipping and no more whistle.

Yep, same issue, new intake boot solved it

[GiancarloArpino]

i have this issue too.. does it hurt or affect anything.?

[quacktoduck]

if al lelse fails spray carb cleaner should hear it with that... chage out all the vaccum lines and intake boots... i was on e46fanatics they are having a pretty good deal on silicone intake boots which are much better than the stock ones...

[mattmartindrift]

i have this issue too.. does it hurt or affect anything.?

I thought you were a mechanic for the Evolve Volvos? You should know this.

Yes. You're pulling in un-metered air, which means the DME can only re-actively respond [based on O2 sensor feedback] to the lean conditions created.

[pj530i]

I checked today and it sounds like a leaf is in there too. I hear the noise in the vacuum but I don't see a hole. I will have to open to do further investigation I had my sister pump the throttle and I clearly hear it but couldn't feel a hole

My intake boot was badly torn but I couldn't feel a hole either. My car still whistles, though, so I'm replacing the CCV next.

[GiancarloArpino]

I thought you were a mechanic for the Evolve Volvos? You should know this.

never once said im a mechanic buddy get a life and get off my case. and if your working for a dealership ur considered a technician not a mechanic. im a 19 year old college student who works for "Smythe Volvo" as a driver on my breaks when I go home I do not work on cars but I do get some experience from getting to watch/talk with the technicians. a simple answer to my simple question would of been sufficient. i also stated that every once in a while we get an "evolve" to come into the shop.. wow ur ridiculous