Squeak under car every time push or release throttle

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Davidren
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Squeak under car every time push or release throttle

Post by Davidren » Mon May 28, 2018 9:31 am

Can someone help, I’ve have a really annoying squeak coming from under the car every time I press or release the throttle, usually about a second or two after the action. It’s quiet loud and can hear it even with the windows closed. I’ve searched the forum and web and can’t find it mentioned by anyone else. Any ideas welcome.

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Re: Squeak under car every time push or release throttle

Post by Davidren » Mon May 28, 2018 9:32 am

Update, it’s a 5 door M140 with ZF8 and no modifications.


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Re: Squeak under car every time push or release throttle

Post by marco_polo » Mon May 28, 2018 9:34 am

Active exhaust valve opening and closing? For a quick and easy diagnosis, I'd temporarily unplug it, then see if you can still replicate your squeak.
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Davidren
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Re: Squeak under car every time push or release throttle

Post by Davidren » Mon May 28, 2018 7:44 pm

Good idea Marco, I’ll give that a go.


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Re: Squeak under car every time push or release throttle

Post by Boosted_Six » Tue May 29, 2018 10:53 pm

Engine mount rubber is my guess...

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Re: Squeak under car every time push or release throttle

Post by stirkee » Sat Jul 07, 2018 6:40 pm

Did you manage to get to the bottom of this David?

Mine seems to do the same thing- when I press or release the throttle I can hear a squeaking noise. At first I actually thought it was birds tweeting but after a while I realise it's actually my car, ha.

Edit: I believe I've only noticed this since I started getting the exhaust rattle about a month ago. Could they be linked in anyway?

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Re: Squeak under car every time push or release throttle

Post by Dylanm135i » Sat Jul 07, 2018 7:00 pm

I had this exact problem and also had the exhaust rattle, now have mpe and the sound is well and truly gone, could be a coincidence but no doubt its the exhaust.

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JS84
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Re: Squeak under car every time push or release throttle

Post by JS84 » Sat Jul 07, 2018 7:04 pm

Had the same issue, especially if the car is warm/spirited drive. Think its the exhaust valve.

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Re: Squeak under car every time push or release throttle

Post by stirkee » Sat Jul 07, 2018 11:23 pm

Dylanm135i wrote:
Sat Jul 07, 2018 7:00 pm
I had this exact problem and also had the exhaust rattle, now have mpe and the sound is well and truly gone, could be a coincidence but no doubt its the exhaust.

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Cheers, I did suspect it was something to do with the exhaust. Got my car booked in to the dealer in a few weeks so hopefully can be sorted out!

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Re: Squeak under car every time push or release throttle

Post by Davidren » Sun Jul 08, 2018 7:58 am

Hi all, not got to bottom of it yet. Mines booked in for an oil service and put a note on to check this. I hope it’s remains warm for another week as it seems to only happen when air temp is 20+ degrees.


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Re: Squeak under car every time push or release throttle

Post by Glund91 » Sun Jul 08, 2018 8:54 am

I have this issue with my car, but I have silencers deleted and the MPE so I don't think mine can be the exhaust.

Almost sounds a little bit like tyre spin when I let off the throttle but at low speeds and this weather it can't be that.
M140i Shadow in SO w/ MPE

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Re: Squeak under car every time push or release throttle

Post by SilverSport » Tue Jul 10, 2018 2:29 pm

Could it be the same as what I describe in my thread here? - http://www.babybmw.net/viewtopic.php?f=74&t=111047
M140i / AW / MPE

Chunks
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Re: Squeak under car every time push or release throttle

Post by Chunks » Sat Jul 14, 2018 5:35 pm

I had this exact problem, turned out the seals on my boot had dried and squeaked when I accelerated and let off. I put a rubber dressing on every seal and haven’t had the problem since. Like your symptoms it was only when the weather was warm. I used to drive round with the windows down purposely accelerating and letting off to hear where it was coming from. Hope this sorts it. Worth a try.

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Re: Squeak under car every time push or release throttle

Post by CharlesM505 » Sun Jul 15, 2018 8:32 am

Hi Guys, exact same problem I have. Is quite a loud squeak too, doesn't sound like rubber (as it sounds metallic) but a lot have reported the door seals so I will try this as Chunks says. 5 dr, but exhaust on mine is non BMW so again cannot be exhaust rattle issue.

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