Potential boost leak, or bad turbo?

Discussion in 'Generation 4 - Maintenance & Troubleshooting' started by SLO_SHO, Jul 13, 2019 at 12:06 PM.

  1. SLO_SHO

    SLO_SHO Member

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    Hello all,
    I am currently tuned by gearhead and in my logs it shows that I could possibly have a boost leak with what the data shows. The boost drops but than will regain more pressure. I've been trying to find a leak but can't seem to pinpoint it. Last night I decided to pop the hood again and "brake boost" up to 2k to see if I could hear or see anything . Once the car started to build boost it was making what sounded like a 'growling' noise before the BOV would blow off. It only happens under load which makes me believe it's turbo related. I plan to bring it in this week but thought I would bring it up here to see if anyone has an idea. I will post YouTube video to go along with the post. Thanks in advance!



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  2. Johnbigdog

    Johnbigdog SHO Member

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    I'm not in a position to listen to the video.

    Our cars can run on one turbo if the other fails, however there can be a lack of volume of air in certain situations.

    Usually the turbo that's quiet has failed and the noisy one is the one thats working, for now.

    You can use a bore scope for a visual inspection without having to remove the turbine ductwork. After figuring out which one is which with a stethoscope, a long screwdriver, or pry bar to your ear.
     
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