High pitch noise from engine. Exactly like mosquito cellphone ringtone
Results 1 to 9 of 9

This is a discussion on High pitch noise from engine. Exactly like mosquito cellphone ringtone within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; yeah so basically when my car is idling there is a very high pitch frequency type noise. Its very similar ...

  1. #1
    Registered User scoobe's Avatar
    Join Date
    Apr 2008
    Location
    Barrington IL
    Posts
    80

    High pitch noise from engine. Exactly like mosquito cellphone ringtone

    yeah so basically when my car is idling there is a very high pitch frequency type noise. Its very similar to that ring tone on cell phones that hurts your ears if your younger. People 40 and up usually cant hear it because of how slow hearing loss is.

    It sounds like its coming from right in the center of the engine. Pretty hard to locate in general.

    I recently replaced the cars MBC (dont know brand) that came with the car with the stock hoses and retrictor pill. the noise was going on long before i put it back to stock. Currently its 100% stock idling at 18-20 vac and hitting full boost around 4000rpm

  2. Remove Advertisements
    ClubWRX.net
    Advertisements
     

  3. #2
    Registered User
    Join Date
    Mar 2003
    Location
    tacoma
    Posts
    656
    not sure what it is but I had the same thing on my 03 legacy l, you could only hear it if you were outside the car. Spoke to a few dealers and they said its normal?

  4. #3
    Registered User Timdog1650's Avatar
    Join Date
    Aug 2002
    Location
    Virginia Beach, VA
    Posts
    6,170
    I wish I had a better answer, but I get it too. As long as the car drives/performs properly, I would not suspect a problem.

  5. #4
    Registered User scoobe's Avatar
    Join Date
    Apr 2008
    Location
    Barrington IL
    Posts
    80
    yeah im hoping theres nothing related to it. the only thing i was suspicious of was a boost leak. I remember another member saying boost leak can be a very high pitch noise, but what im hearing sounds more like friction of some sort.


    I am hitting full boost around 4000rpm though, i recentely took of my cars MBC and put on all the stock hoses and retrictor pill back in. i dont think i have a leak but what else could be slowing my boost progression?

  6. #5
    Registered User justin.jordan2's Avatar
    Join Date
    Feb 2008
    Location
    FAIRFIELD, CALIFORNIA
    Posts
    937
    I had this problem on my car. i found it was a boost leak coming from the back top of the intercooler. i just had to retorque the bolt back. it fix the problem. but i only heard it when i built one pound of boost and above.!!! so if ur still hearing it a negative boost i have no idea.
    COBB FLASHED STAGE 2, UPPIPE, DOWNPIPE WITH HIGH FLOW CAT, AND FULL 3 INCH CAT BACK, 160 CRUCIAL RACING THERMOSTAT, K&N FILTER. TRACK: 1/4 MILE 13.66 102.7 MPH ON THE COBB OTS MAP

  7. #6
    The Default One SeattleJeremy's Avatar
    Join Date
    Jul 2004
    Location
    Seattle, WA
    Posts
    4,488
    If it's a boost leak your turbo will have a hard time reaching peek boost.
    What is the peak boost? Does it hold from 4000 to 6000 (it's suppose to taper off after 6000)

  8. #7
    He simply abides. SD_GR's Avatar
    Join Date
    Jul 2002
    Location
    CA, US
    Posts
    22,580
    I Support ClubWRX
    The alternator makes a high pitched whine sometimes. No cure but also no problem.
    WRX Info Links, Courtesy TheJ
    The world breaks everyone and afterward many are strong in the broken places. Ernest Hemingway
    I lied. I cheated. I bribed men to cover the crimes of other men. I am an accessory to murder. But the most damning thing of all... I think I can live with it. And if I had to do it all over again - I would. Benjamin Sisko
    DISCLAIMER: Opinions expressed are the author's alone and are inherently worthless.

  9. #8
    Registered User
    Join Date
    Mar 2003
    Location
    tacoma
    Posts
    656
    Quote Originally Posted by SD_GR View Post
    The alternator makes a high pitched whine sometimes. No cure but also no problem.
    yeah, sort of like the noise a tv makes or when a computer monitor is going out right?

  10. #9
    He simply abides. SD_GR's Avatar
    Join Date
    Jul 2002
    Location
    CA, US
    Posts
    22,580
    I Support ClubWRX
    Yes that's a very good description of the noise. Mine's done it for years without any detectable fault in the alternator. I've heard from others that their cars do it too.
    WRX Info Links, Courtesy TheJ
    The world breaks everyone and afterward many are strong in the broken places. Ernest Hemingway
    I lied. I cheated. I bribed men to cover the crimes of other men. I am an accessory to murder. But the most damning thing of all... I think I can live with it. And if I had to do it all over again - I would. Benjamin Sisko
    DISCLAIMER: Opinions expressed are the author's alone and are inherently worthless.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •