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#Help? my 94 Turbo legacy is making mooing noises like a cow.

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 Post subject: Help? my 94 Turbo legacy is making mooing noises like a cow.
PostPosted: Tue Oct 02, 2018 10:29 pm 
In Neutral
Joined: Tue Oct 02, 2018 10:03 pm
Posts: 2
My 94 Turbo Legacy started making a low whooshing sound. Only happens when I let off the gas above 2k-3k rpm with some boost built. Honestly, it sounds like a cow mooing. doesn't happen when car shifts in boost. Anyone have any idea what I'm hearing? Should I be worried?

Seem like sound is coming from the rear end.
Car has 140,000 Miles on it.


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 Post subject: Re: Help? my 94 Turbo legacy is making mooing noises like a
PostPosted: Mon Oct 08, 2018 7:39 pm 
Site Admin
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Joined: Tue Oct 15, 2002 11:37 am
Posts: 27337
Location: Houston, Tx
Welcome to the BBS.

What you are likely hearing is the bypass valve dumping pressure back into the intake. The other possibility is if the bypass valve is not functioning properly it could be compressor surge on the turbo.

Do you have any modifications to the engine/turbo or is it all stock?

I'm going to move your thread to the turbo forum.

_________________
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm


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 Post subject: Re: Help? my 94 Turbo legacy is making mooing noises like a
PostPosted: Wed Oct 10, 2018 12:01 am 
In Neutral
Joined: Tue Oct 02, 2018 10:03 pm
Posts: 2
Car is all stock.

I am going to try and get a recording with the noise. Can only hear the noise while driving. Unable to recreate noise reving engine while sitting in park or neutral.


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 Post subject: Re: Help? my 94 Turbo legacy is making mooing noises like a
PostPosted: Wed Oct 10, 2018 5:17 pm 
Site Admin
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Joined: Tue Oct 15, 2002 11:37 am
Posts: 27337
Location: Houston, Tx
Ok, yeah if you can take a recording and upload to youtube or something that would be helpful.

_________________
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm


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