Installed radio, got a whizzing noise with engine revs help!

Post by **flowersGTR** » Fri Jan 02, 2009 4:31 pm

ive installed a radio (and amp) in to my minor convertable and now when the engine is running i get a high pitched "whizzing" noise that increases with engine revs
im told this might be to do with the alternator (fitted last year) and will need some sort of suppressor?

ive asked all the local car shops and they dont have any suppressors

any help would be greatly appreciated
thanks

Post by **8009STEVE** » Fri Jan 02, 2009 4:38 pm

You need to fit a suppressor to the alternator. All our local car shops sell is car body kits etc. try a motor factor.

Post by **picky** » Fri Jan 02, 2009 5:14 pm

try a short drive with the fan belt off to check it really is the alternator. I would have though modern alternators are supressed; I dont have any extra suppressor on my alternator and the radio works fine.

Picky

Post by **bmcecosse** » Sat Jan 03, 2009 11:56 am

Could be any electrical motor /generator. Good tip to try without fan belt. probably need suppressor on coil/wipermotor/fuelpump/heater fan/voltage stabiliser - but not usually required on an alternator - although no harm fitting one. Also put a big one on the supply lead to the wireless.

Post by **FrankM83** » Sat Jan 03, 2009 5:26 pm

sorry hijacking!! coincidentally while having a ride in my friend's 04 Yaris! I noticed this too when he revs there's a whizzing noise fromt he stereo, so what exactly is a suppresor please?

Post by **bmcecosse** » Sat Jan 03, 2009 6:21 pm

A capacitor/condenser! If nothing else available - use ignition condenser. Earth the body under a bolt - and connect lead to the supply connection.

Post by **beechford** » Wed Jan 07, 2009 10:41 am

it might help to mount arial on opposite guard from distributer make sure it has a good earth

Post by **ferret76** » Thu Jan 08, 2009 1:56 am

I was just looking through the workshop manual in preparation for replacing the front bearings and in one of the diagrams was a little spring and screw that is in the hub. The description of the diagram stated that these were for models with radios fitted. I don't know if that helps at all. Something to do with anti-static.