Canary94GT

I'm not really a wiring nor sound expert, but I'm curious why my cassette player buzzes really loudly while its on. The buzz seems to change with engine RPM. It used to not be so bad, but it has gotten worse. (though I have just replaced the majority of the ignition system and have not tested it since.

What could I look for to diagnose the problem? Where could I start?

longlive289s

does it buzz from just the unit or from the speakers. im assuming its not a buzz like vibration ie: loose

Canary94GT

Actually, I've tried it with the car off now and it was perfect. I am pretty sure the buzz with the engine on is related to the ignition.

jonm1a1

i am no eletrician but i have messed up enough wiring to know a buzz is sometimes to much juice to something.

scootchu

It most likely is alternator whine and being that it's fine while the car is off confirms that. You should double check your ground to the radio and amps if you have any. Also check cabling to amps (if applicable) to make sure no line input cables are near power cables. That's a a start.

Starfury

You may also replace the RFI solenoid mounted to the voltage regulator, if it's still there. The whole point of it is to help remove RFI from the voltage switching in the regulator.

Also, what wires are you using? Aftermarket "performance" wires tend to have poor RFI shielding.

Canary94GT

Some new BWD wires which I have not tested yet along with the rest of my ignition stuff such as the spark plugs.

Is there some other name for the RFI solenoid? Having a hard time looking that up

knuckless

whats a cassette player?

Canary94GT

Haha well its actually a really good sound system my dad installed like 30 years ago... if only they still made cassettes.

Starfury

Sorry, I meant capacitor/condensor, not solenoid. Teach me to post that late.

It's a little metal cylinder wired up to the voltage regulator.