posted
I seem to be picking up a steady engine noise in my radio. It does not change with the rpm though. I have a power wire from the battery to the constant power on the radio and the power on power is in the IGN spade with an old filter I found in a box. Yes I have resistor plugs but remember it doesn't follow rpm's. The noise is also unchanging with volume so what the heck?!? When I crank it up you can't hear it anymore but I know it is there. It is on but the front and rear speakers. I have one amp driving the 6x9's in the rear and one amp driving the sub in the trunk.
Any obvious things I need to check for? I moved the power on wire to the constant power source and no change. I suppose I can start by isolating speaker sets? Could it be a grounding issue? I was already laying upside down yesterday under the dash to no avail.
THANKS GUYS!!!
-------------------- Darren A. 1970 Chevelle ALL ORIGINAL 1972 4-door Chevelle 355/350/3.73posi Winner.StreetTrophy.May11.2008.BIR 1998 Silverado/Z71/Extended/5.7L Posts: 601 | From: Hopkins, MN USA | Registered: Aug 2004
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posted
Yes, it is a ground issue. I used to install car audio years ago, and have found that poor grounding leads to picking up engine "artifacts" such as alternator whine, rpm whine, etc. etc. I think if you move your ground, or clean it well it should go away.
Posts: 115 | From: Waconia | Registered: Sep 2007
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posted
Check your ground on the antenna to the body and ground to the radio. AM will show weak grounds that FM hides. Use a dielectric grease on connections to promote contact and prevent corosion.
-------------------- Mess with me, and you mess with the whole trailer park! Posts: 1255 | From: clearlake | Registered: Aug 2004
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posted
I ran a ground wire from the battery/fender straight to the radio, no change. I disconnected/reconnected the antenna, no change. This was actually fine until a week ago or so, go figure.
-------------------- Darren A. 1970 Chevelle ALL ORIGINAL 1972 4-door Chevelle 355/350/3.73posi Winner.StreetTrophy.May11.2008.BIR 1998 Silverado/Z71/Extended/5.7L Posts: 601 | From: Hopkins, MN USA | Registered: Aug 2004
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posted
If I get a chance I am going to take the amps and all their connections out of the loop and go from there.
-------------------- Darren A. 1970 Chevelle ALL ORIGINAL 1972 4-door Chevelle 355/350/3.73posi Winner.StreetTrophy.May11.2008.BIR 1998 Silverado/Z71/Extended/5.7L Posts: 601 | From: Hopkins, MN USA | Registered: Aug 2004
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posted
I isolated the radio and front speakers only but still have the problem. Maybe my stereo has gone bad.
-------------------- Darren A. 1970 Chevelle ALL ORIGINAL 1972 4-door Chevelle 355/350/3.73posi Winner.StreetTrophy.May11.2008.BIR 1998 Silverado/Z71/Extended/5.7L Posts: 601 | From: Hopkins, MN USA | Registered: Aug 2004
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posted
Nope, put another old stereo in there = same noise. Maybe one of the two power wires are worn though and grounding? Maybe I will set a battery on the floor and try that.
-------------------- Darren A. 1970 Chevelle ALL ORIGINAL 1972 4-door Chevelle 355/350/3.73posi Winner.StreetTrophy.May11.2008.BIR 1998 Silverado/Z71/Extended/5.7L Posts: 601 | From: Hopkins, MN USA | Registered: Aug 2004
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That first post touched on what fixed the noise problem ...
**Use a length of 10Ga. wire for the Neg - connection at the amp as well - Keep this wire as short as possible, and make the best grounding connection you've ever done on this connection.
I had a ground wire to the battery so as soon as I shortened to about 12 inches and attached it to the chassis problem 99% gone!
-------------------- Darren A. 1970 Chevelle ALL ORIGINAL 1972 4-door Chevelle 355/350/3.73posi Winner.StreetTrophy.May11.2008.BIR 1998 Silverado/Z71/Extended/5.7L Posts: 601 | From: Hopkins, MN USA | Registered: Aug 2004
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