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Radio Interference

Discussion in 'Technical Q&A' started by Skindiver, Jun 14, 2004.

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  1. Skindiver

    Skindiver Karting

    Apr 22, 2004
    203
    JHB SA.
    Full Name:
    Greg
    #1 Skindiver, Jun 14, 2004
    I have some sort of interference on my '89 "ABS" 328's Radio. After 10 - 15 km on each drive i start to get a blipping interference over the radio that often starts after a hard turn. It seems to be related to the turning wheels ? and only occurs when i'm moving even with the clutch in.

    At low speed it cuts out the radio in staccato type blips, this increasing or decreasing with speed to a rising and falling whine over the speakers.

    If i stop the car carefully i can actually stop on a "blip' which then totally blanks the radio out untill i roll forward a smidge again. Revving the engine does not affect it.

    Any ideas to fix it ?

    Skin.
     
  2. Tod328gts

    Tod328gts Formula Junior

    Jul 23, 2003
    626
    River Forest, IL
    Full Name:
    Tod Whitmore
    #2 Tod328gts, Jun 14, 2004
    I would first guess a loose ground wire somewhere. But you could have a faulty radio too???? The radio may have a bad component, such as a filter CAP in the power supply section. Could be a number of things, first i would check all the ground wires for the radio. If those look ok, try adding a filter on the power going to the radio, you can get those at a radio shack. There could also be something in the ignition system causing this problem too???

    My 2 cents...

    Tod
     
  3. f355spider

    f355spider F1 World Champ
    Owner Rossa Subscribed

    May 29, 2001
    18,055
    USA
    #3 f355spider, Jun 14, 2004

    I would agree with Tod. It sounds like an intermittent connection somewhere, and grounds on these older cars can get questionable. Also, check the ground on the antenna. I had an annoying problem with engine alternator whine coming through my AM radio. The fix was to actually replace the semi-automatic antenna. Even though the ground was good, tight and clean. Not sure what was bad in my antenna, but a new one fixed the problem.
     

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