central3 31 Report post Posted June 19, 2011 I have a Dennison IPod interface unit fitted to my E46 330i - when using an IPod there is a high pitched whine which changes with engine rpm. I guess it is alternator or ignition interference - anyone sorted this in an E46 before? Quote Share this post Link to post Share on other sites
BM WORLD 1283 Report post Posted June 19, 2011 not sure , but make sure your (possitive)power wires dont run next to your audio wires. Quote Share this post Link to post Share on other sites
bravo 35 Report post Posted June 19, 2011 If it's only with e iPod then the problem is between the iPod and whatever the dennison interface is connected to. Likely to be a dodgy cable or earth loop. Quote Share this post Link to post Share on other sites
BMRBOI 8 Report post Posted June 20, 2011 My e36 does this. i got told it was somthing to do with the spark plugs (change them to resistor ones or somthing).. not sure if that is true. Quote Share this post Link to post Share on other sites
rjac001 0 Report post Posted June 20, 2011 Just to be sure try another ipod fm transmitter im assuming it plugs in through your cigar lighter so the only way for interference to occur is if speaker wires are very close to power wires or your ipod transmitter is faulty and getting interference from its power source Quote Share this post Link to post Share on other sites
bravo 35 Report post Posted June 20, 2011 Earth to the cig lighter is probably shithouse. Replace it with a new one as a precaution. Easy job. Run a new earth wire to one of the earth points behind the dash. Quote Share this post Link to post Share on other sites
M5V8 337 Report post Posted June 21, 2011 yup, bad earth Quote Share this post Link to post Share on other sites
central3 31 Report post Posted June 22, 2011 yup, bad earthThanks guys - will check the earth as I had no problems when I first installed the unit so something has changed Quote Share this post Link to post Share on other sites
