Air Filter Change and now engine noise...Help
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This is a discussion on Air Filter Change and now engine noise...Help within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I recently changed my WRX air filter with a basic paper purolator air filter. After the install I noticed that ...

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    Air Filter Change and now engine noise...Help

    I recently changed my WRX air filter with a basic paper purolator air filter. After the install I noticed that when I really get on it, I hear a whooshing sound like air is escaping from a vacuum. I had some trouble getting into the air box and the stock intake popped out. I placed it back in and sealed everything back up. The filter is in correctly and I am not throwing any codes. I only hear the noise under hard acceleration. So...no problem? The old filter was caked with crud so maybe it is just breathing better? Any thoughts would be appreciated. Thanks.

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    Registered User cflip2x's Avatar
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    What year is your car? How many miles? Any Mods?
    If its 08-14 I would guess throttle body IC hose. Other then that Maybe post some pics of your intake box maybe someone can see if something doesnt line up correctly.
    2012 WRB 4DR | SPT Exhaust | Short Throw | Rally Armour | WC Lathe Werks Custom TI Knob | Kartboy Bushings | Stoptech Brake Lines | JBK Elements DRL | STI HID Retrofit | XB LED Angel Eyes | GrimmSpeed Lightweight Crank Pulley

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    Oops...It is a 2010

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    He simply abides. SD_GR's Avatar
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    If the housing is correctly installed and there are no leaks, then no problem. Either way if it's an issue you will eventually get a PO171 or similar CEL. What you describe so far does not sound abnormal though.
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    Admiral Ackbar the 1st mycologist's Avatar
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    Yeah, but do check that both of the tabs are inserted in the bottom of the airbox correctly if it is like the old ) ones that are rather difficult to seal.
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    I am certain it is that the box is not sealed correctly. There is a gap in the box on the fender side of the car. It looks like it is not lined up right. Are the boxes on the 2010 like the older models...harder to seal? I am thinking I will take the whole box out this weekend, but just looking at it briefly last night I couldn't see how to get it out. Anyone ever take the whole box out to change the filter? Do I need to remove the intake first? Seems like a crummy design on Sub. part...granted I am not a mechanic.

  8. #7
    Registered User degobah77's Avatar
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    Same thing happens on my '13. The airbox never felt like it sealed up perfectly, but I've never thrown any codes. Well, cept for when I forgot to plug the MAF back in...and the whoosing I think is normal.
    Not so much anymore.

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