Results 1 to 13 of 13

Thread: New alternator = FM frequency static. Why and how do I fix it?

  1. #1
    Join Date
    Jun 2008
    Location
    Oakville
    Posts
    190
    Time Online: 3 Wks 5 Days 5 Hrs 32 Mins 12 Secs
    Avg. Time Online: 2 Mins 9 Secs
    Rep Power
    10

    New alternator = FM frequency static. Why and how do I fix it?

    Car is a 2001 VW new beetle.

    Replaced the alternator in hopes to fix an unrelated charging issue. Radio was fine before the swap. Now there is a lot of static on most of the FM stations. It doesn't do it in sync with a rev or anything like that, its just in and out as you're driving along.

    Alternator is a re manufactured Valeo brand from a local alternator and starter shop.

    There is no specific ground off the alternator and the battery terminals are clean. No CELs on the dash and the electronics seem to be working as normal.

    It does have an aftermarket HU installed, but has been there the past 5 years without issue.

    Any ideas would be much appreciated.

    Thanks everyone.

  2. #2
    Join Date
    Mar 2009
    Posts
    4,500
    My Mood
    Aggressive
    Time Online: 11 Mths 3 Wks 21 Hrs 35 Mins 14 Secs
    Avg. Time Online: 28 Mins 55 Secs
    Rep Power
    13
    EDIT: RETARDED BRAIN FART...was thinking of different vehicle with my previous comments...new comments in my next post...
    His ---> 04 LJ - 4.0L, Auto ɹnoɟ pɐǝɹʇǝɹ
    Hers ---> 75 Renegade Project - 304 V8, T15 3 speed uoıʇɐıɔossɐ ʎq pɐǝɹʇǝɹ

  3. #3
    Join Date
    Nov 2011
    Location
    St. Thomas
    Posts
    1,975
    Time Online: 1 Yr 1 Mth 1 Wk 4 Days 16 Hrs 51 Mins 3 Secs
    Avg. Time Online: 33 Mins 26 Secs
    Rep Power
    8
    How is the reception with the engine off?

  4. #4
    Join Date
    Mar 2009
    Posts
    4,500
    My Mood
    Aggressive
    Time Online: 11 Mths 3 Wks 21 Hrs 35 Mins 14 Secs
    Avg. Time Online: 28 Mins 55 Secs
    Rep Power
    13
    "New" Beetles required a "powered antenna adapter" to convert from the European style antenna plug to the typical Motorola style used on aftermarket stereos in North America...


    Prior to this issue with reception, did you have any AM reception? If so, do you have any AM reception now?

    I ask this because the AM reception was greatly affected by using a non amplified antenna adapter, so much so, that you wouldn't even get static, it just sounded like dead air. If you had AM reception before and not now, then it is likely that the powered antenna adapter has crapped out...


    If you did not have AM reception prior to this issue, then it is possible they didn't use a powered antenna adapter when the radio was installed...in that case, it is possible the antenna adapter has come loose or is damaged in some way.


    Either way, the radio would have to come out to check/change the part.

  5. #5
    Join Date
    Jun 2008
    Location
    Oakville
    Posts
    190
    Time Online: 3 Wks 5 Days 5 Hrs 32 Mins 12 Secs
    Avg. Time Online: 2 Mins 9 Secs
    Rep Power
    10
    Thanks for the ideas fellas. I will check the above items and report back.

  6. #6
    Join Date
    Oct 2004
    Location
    beamsville
    Posts
    1,326
    Time Online: 2 Mths 18 Hrs 57 Mins 48 Secs
    Avg. Time Online: 4 Mins 59 Secs
    Rep Power
    15
    Do you have a bad spark plug wire? used to use a radio static condenser,when you ran solid copper plug wires was a old fix

  7. #7
    Join Date
    Oct 2012
    Location
    Windsor,On
    Posts
    911
    Time Online: 10 Mths 1 Day 5 Hrs 51 Mins 9 Secs
    Avg. Time Online: 24 Mins 46 Secs
    Rep Power
    6
    maybe bad alternator have it checked for ac singnal from alternator. if its ok or no one will help go get a noise suppressor from a stereo shop

  8. #8
    Join Date
    Aug 2011
    Location
    Hamilton, Ontario
    Posts
    638
    My Mood
    Daring
    Time Online: 1 Mth 1 Wk 4 Days 12 Hrs 50 Mins 12 Secs
    Avg. Time Online: 3 Mins 24 Secs
    Rep Power
    7
    This might help...found it on the internets.
    You most likely have a ground problem or lack thereof.

    http://www.caraudio.com/forums/wirin...tor-whine.html
    93 YJ - Stock 2.5L inline 4, 4" Rough Country Lift, 1.5" Shackles, 33" BFG's, SYE yet to be installed, Raptor Liner Sprayed, CB, Stereo that goes BooM, Aussie locker front, XJ solid shafts, tube fenders by Tubular Metalworx, 8500lb winch, Garvin swing away tire carrier and clearly far too much time on my hands. No roof, no doors and two screaming kids in the back.

  9. #9
    Join Date
    Mar 2009
    Location
    Caistor Centre - Cultural Hub of the universe
    Posts
    4,937
    My Mood
    Buzzed
    Time Online: 10 Mths 3 Wks 5 Days 6 Hrs 28 Mins 55 Secs
    Avg. Time Online: 26 Mins 49 Secs
    Rep Power
    28
    Hopefully, the OP got this fixed up since he posted.........in January. :rolleyes:
    A Member of:
    New Frontier 4x4 Club
    OF4WD 4928 & 6687


    1980 CJ Juggy
    2004 GC 4.7 HO Overland

    "Simple, yet functional....like a Sledgehammer"

  10. #10
    Join Date
    Dec 2009
    Location
    burlington
    Posts
    347
    My Mood
    Devilish
    Time Online: 1 Wk 3 Days 12 Hrs 36 Mins 58 Secs
    Avg. Time Online: 51 Secs
    Rep Power
    9
    Quote Originally Posted by CTD NUT View Post
    Hopefully, the OP got this fixed up since he posted.........in January. :rolleyes:
    it's a Beetle nothing moves fast not even replies move fast!
    Birdman
    ditch the bitch! let's go muddin'

  11. #11
    Join Date
    Jun 2008
    Location
    Oakville
    Posts
    190
    Time Online: 3 Wks 5 Days 5 Hrs 32 Mins 12 Secs
    Avg. Time Online: 2 Mins 9 Secs
    Rep Power
    10
    Just to add closure to this thread.

    Ended up replacing the aftermarket HU with the factory unit last winter. Signal interference on FM was gone. I'm assuming something in the aftermarket HU was f-ed up due to the faulty alternator.. I didn't feel like messing with it in -20 degree weather and since I don't drive it, the fiancee seemed fine with the stock radio.

  12. #12
    Join Date
    Sep 2007
    Location
    Brantford
    Posts
    7,986
    Time Online: 4 Mths 2 Days 17 Hrs 46 Mins 57 Secs
    Avg. Time Online: 10 Mins 5 Secs
    Rep Power
    118
    Quote Originally Posted by CTD NUT View Post
    Hopefully, the OP got this fixed up since he posted.........in January. :rolleyes:
    thats Two threads that Jeeper52 has bumped up almost a year stale in the last month. LMAO....
    My latest project... Collection of Parts

    Other stuff... Building a doubler, D300 Flip kit

    Quote Originally Posted by Deadman 94 xj View Post
    "Coil springs are for ballpoint pens and pogo sticks".
    ебут раком

  13. #13
    Join Date
    Dec 2007
    Location
    Odessa
    Posts
    1,285
    My Mood
    Happy
    Time Online: 3 Mths 2 Days 4 Hrs 33 Mins 57 Secs
    Avg. Time Online: 7 Mins 34 Secs
    Rep Power
    12
    Quote Originally Posted by Jak Flash View Post
    thats Two threads that Jeeper52 has bumped up almost a year stale in the last month. LMAO....
    i noticed this aswell....
    If its a mechanical device i can fix it

Posting Permissions

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