Cd Player Interference...not harmfull just damn annoying

[kiwi_bloke]

Ive just installed a new cd player in my mercedes. It has an electrical filter attached to it but when the engine is started and is running there is some kind of interference. The slower the engine revs the louder the interference, if you bring the revs up to about 2000 rpm then the noise is nearly inaudible. The other day when i had a relativly flat battery the interference was very noticable! When the key is turned to kick over the engine there is a sharp whisle...... sort of "shhhwwwttt" then when the engine is running it is a whistleing / whirring noise. As i said it gets faster and quieter when the motor runs faster leading me to think its the alternator. I tried goin thru the fuse box and removing fuse by fuse and relay by relay to isolate the problem no luck. Also i disconected the coil and cranked the engine...no luck. I put a heavy duty electrical filter on the cd player. Im out of ideas! Also removing the fanbelt as a test stopped the interference... Its not my arial as ive tried several. My thought are its a faulty earth wire or the alternator needs a suppressor? But hey MB alternators have a suppresor pre fitted.....Any advice is much appreciated....


Regards

Josh

1986 190e 2.0 Mercedes Benz

 

[Matt Crooke]

My mate has this exact problem on his Mondeo. You will need the supressor on the alternator, its the only way to stop it. His ICE is wired with various amps to power the huge speakers he has, it turned out that it wasnt the actualy head unit causing the problem, but one of the amps. Fitted the supressor and hey presto, no more irritating squealing!

 

[kiwi_bloke]

Thanks!!

Thanks mate....have some suppressors ordered....it seems talking to the local auto electritians got me lost...they had no idea what a suppressor was lol. I had to go straight to a supplier, hopefully theyll do the trick

thanks for you help.....

Josh

86 190e merc

 

[kiwi_bloke]

argghhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

hehe suppresors didnt work, turned out the merc had one already fitted....replacing it made no difference....removing it made no difference....

TIME TO GET A NEW HEAD UNIT I RECKON hehe

josh

ps for any one out there whos looking at buying a head unit dont buy cheap........

 

[Spike]

Just wondered if you had the correct Spark plugs in. IIRC, the 'R' in the spark plug code indicates that they are surpressed and therefore suitable for use in a vehicle with a radio.

On the otherhand, I may be talking a load of bull..... but I do distinctly remember this coming up before somewhere in the dim and distant past.

 

[kiwi_bloke]

i seeee

yep u seem to be talking sense :lol: hehe i already checked out that by disconecting my coil and cranking the engine.....bingo that sound is still there hehe im pretty sure it was related to the radio unit not the car....

ill let u guys know how i get on

cheers

josh

 

[kiwi_bloke]

my dilemas are over!!!!

i got me a decent kenwood cd player and bingo the problem dissapeared!! i guess more expensive is better quality......

thanks guys for all ur help

josh[/u]

 

[mofo]

make your own earth that usually works eqarthing all amp and radio at on point also helps

 

[jaymanek]

I tried putting a fifty quid cd player in once, i put suppresors everywhere i could, nothing stopped it. Then i went and bought a decent Pioneer system - Crystal Clear......


Moral - DONT PUT CHEAP CRAP IN A MERC!!!!

 

[kiwi_bloke]

damn right!!

ive learned my lesson *bows head in shame* after putting in a second hand idle control valve to be cheap, a cheap alarm and a cheap head unit, i learnt........