in my 80 ls when i turn the radio on i can hear the song but there is this awful constant buzzing. even when i turn the volume all the way down the buzzing remains the same. it is a stock factory radio. what could be the problem? i suspect a faulty ground. where should i begin to look? it has the original plugs and wires(only 57K on the car, it is pretty much mint i have heard cases in which this caused radio interference, but they are the correct p/w). thank you, dave

 

I would say ground too. But remember it is 23 years old now. The radio could just be going bad!

 

this is true..... lets hope not..

 

I had this exact same problem and it went away when I replaced all my spark plug wires.

 

well, i will give that a try. i didn't want to replace many of the original parts, as about 95% of the car is factory original. i suppose it can't hurt. the car runs perfect. you could balance a glass of water on the air cleaner and it wouldn't even think of jarring off. i'll order a new set and keep the old ones as spares. my garage is littered with boxes and bins of spare parts. i am an rx-7 parts pack rat.

 

Does the buzzing noise change at all if u rev your car up or get on it. If it does, check your fuel pump ground, thats happened on a few other cars of mine. The pump grounds through the stereo and u get to hear everything it does.

 

i'll look into that when i go to the store this morning and get back to you on that.

 

i had the same thing happen to me in my first RX-7. mine was buzzin cuz i had bad distributer wires . once i changed the cap and wires it went away.....

 

the buzzing does not change, it remains constant. i even tried it under load. i ordered a new set of ngk wires this morning. we'll see if that helps. if there are any other suggestions, i am all ears. thank you.

 

Wow, you could buy two radios for the price of wires, dizzy cap and plugs. CD players these days will play mp3's too.

 

i paid 27.00 for wires from mazdatrix. i will pick up the cap and rotor button tomorrow.

 

buzzing remains constant when car is not running and radio is on. i think i can rule out the wires. any suggestions?

 

hmm..... what about the condensor? It's mounted to the engine block right next to the clutch master cylinder.

 

i am not sure what you are talking about inittab.??? what is it's function?

 

it's function, believe it or not, is to quiet down the radio noise. lol

EDIT- Victoria British sells 'em.

 

well, is it only for 79-80 models? i will check on it when i get home on monday.

 

They're on all FB's. It's actually the first thing I replaced when trying to qwell the radio buzzing noise I had. It's a small silver cylindrical device that's mounted to the engine block right near the clutch master cylinder. Ya can't miss it. It didn't fix my buzzing sound but it's worth a shot. Good luck!

 

well, i looked and could not find it. do you have a pic? i saw something mounted to the left side in the engine bay, almost up to the firewall. it was almost bell shaped and had a connector that trailed down into another connector. i thought that may be it but remembered you had said it was on the block.

 

Dave, I remember that condensor. It was that piece that we were wondering about on that locked up motor that we ATF'd. I think we left it on the motor, so we can try swapping it tomorrow when you get back.

 

good call man. not like i have 3 extra motors or anything?!

 

turns out it was a bad amp..who knew..only took 6 years to figure that out and ressurect this ancient thread.

 

lol, damn i'm glad you figured it out tho.

 

yeah i figured it out in 04, i guess i just forgot to post. a buddy of mine reminded me of this thread and suggested that i update it..so i did. i guess a channel in the amplifier is bad causing the buzzing.