68 Radio noise

Blue68Coupe · 10-30-2005, 01:52 PM

I have a 68 coupe with a 289. My problem is the engine noise coming through the radio. I have an aftermarket Customautosound deck with the cd changer in the trunk. I have tried everything to eliminate the noise. Re-ran speaker wires, replaced antenna, new spark plug wires, and the deck has a built in noise suppressor. The only other thing I can think of is a cleaner power source.

Anyone have any ideas on a solution? Anyone know what was the original power source (wire color) used on a 68?

Its very loud through the speakers.

Gearhead999 · 10-30-2005, 02:12 PM

Try running a direct source of 12 volts through a relay to power the radio. I've done this in the past, in fact to my last 68 Mustang to get rid of engine noise.

Phillyfanfrombirth · 10-30-2005, 09:30 PM

I think the original hot wire was light blue red stripe.

Do they still make noise filters? Isn't this problem what they were for?

Blue68Coupe · 10-31-2005, 09:01 AM

I have a filter on the power lead and it does very little if anything. I also added an alternator filter and it had no effect.

I like the relay idea, straight to the battery. I will try that this week.

Thanks

DPotts · 11-07-2005, 10:10 PM

they also have a filter for the distribitor

Blue68Coupe · 11-07-2005, 10:23 PM

I tried a clean source from the battery with no luck. Does anyone have any suggestions on a good filter?

red · 11-08-2005, 10:33 PM

Maybe I am captain obvious here but just incase, make sure you have a good clean ground. That ground wire needs to have good clean metal to metal contact.

Blue68Coupe · 11-09-2005, 08:22 AM

Done that, even tried running the ground to the battery ground.

Ingeneius · 11-09-2005, 10:14 AM

resistor spark plugs? I think non resistor plugs lets noise through the radio no matter how good of ground you have.

Gearhead999 · 11-09-2005, 01:22 PM

What kind of noise is coming through?? A "Popping", "Whirring", "Static". This might help to narrow it down to what is causing the noise.

Blue68Coupe · 11-09-2005, 01:58 PM

Whinning that changes with the RPM. I assume its from the alternater

Phillyfanfrombirth · 11-09-2005, 05:57 PM

Try contacting Crutchfield's support???

10-30-2005, 01:52 PM	#1
Blue68Coupe 68 Coupe 289 Join Date: Apr 2005 Location: North carolina Posts: 44	68 Radio noise I have a 68 coupe with a 289. My problem is the engine noise coming through the radio. I have an aftermarket Customautosound deck with the cd changer in the trunk. I have tried everything to eliminate the noise. Re-ran speaker wires, replaced antenna, new spark plug wires, and the deck has a built in noise suppressor. The only other thing I can think of is a cleaner power source. Anyone have any ideas on a solution? Anyone know what was the original power source (wire color) used on a 68? Its very loud through the speakers. __________________

10-30-2005, 02:12 PM	#2
Gearhead999 Registered Member Join Date: Sep 1998 Location: Oviedo, FL Posts: 992	Re: 68 Radio noise Try running a direct source of 12 volts through a relay to power the radio. I've done this in the past, in fact to my last 68 Mustang to get rid of engine noise. __________________ "Support our Troops" Dave 1968 Cougar 2004 Thunderbird 2007 F150 Harley-Davidson, SuperCrew 1986 LTD 1997 Ranger 1992 Honda Civic

10-30-2005, 09:30 PM	#3
Phillyfanfrombirth Registered Member Join Date: Dec 2004 Location: South Central PA Posts: 358	Re: 68 Radio noise I think the original hot wire was light blue red stripe. Do they still make noise filters? Isn't this problem what they were for?

10-31-2005, 09:01 AM	#4
Blue68Coupe 68 Coupe 289 Join Date: Apr 2005 Location: North carolina Posts: 44	Re: 68 Radio noise I have a filter on the power lead and it does very little if anything. I also added an alternator filter and it had no effect. I like the relay idea, straight to the battery. I will try that this week. Thanks __________________

11-07-2005, 10:10 PM	#5
DPotts Registered Member Join Date: Jul 2005 Location: Topeka, Kansas Posts: 10	Re: 68 Radio noise they also have a filter for the distribitor

11-07-2005, 10:23 PM	#6
Blue68Coupe 68 Coupe 289 Join Date: Apr 2005 Location: North carolina Posts: 44	Re: 68 Radio noise I tried a clean source from the battery with no luck. Does anyone have any suggestions on a good filter? __________________

11-08-2005, 10:33 PM	#7
red Registered Member Join Date: Sep 1998 Location: Millburn, NJ Posts: 310	Re: 68 Radio noise Maybe I am captain obvious here but just incase, make sure you have a good clean ground. That ground wire needs to have good clean metal to metal contact.

11-09-2005, 08:22 AM	#8
Blue68Coupe 68 Coupe 289 Join Date: Apr 2005 Location: North carolina Posts: 44	Re: 68 Radio noise Done that, even tried running the ground to the battery ground. __________________

11-09-2005, 10:14 AM	#9
Ingeneius Sonic Blue 2005 Convertible GT Join Date: Feb 2005 Location: Washington Posts: 19	Re: 68 Radio noise resistor spark plugs? I think non resistor plugs lets noise through the radio no matter how good of ground you have. __________________ Lovin my wifes 05 Sonic Blue GT convertible w/ Black leather interior, But the 67 Fire Red Coupe W/302 Auto. still gets the warm garage.

11-09-2005, 01:22 PM	#10
Gearhead999 Registered Member Join Date: Sep 1998 Location: Oviedo, FL Posts: 992	Re: 68 Radio noise What kind of noise is coming through?? A "Popping", "Whirring", "Static". This might help to narrow it down to what is causing the noise. __________________ "Support our Troops" Dave 1968 Cougar 2004 Thunderbird 2007 F150 Harley-Davidson, SuperCrew 1986 LTD 1997 Ranger 1992 Honda Civic

11-09-2005, 01:58 PM	#11
Blue68Coupe 68 Coupe 289 Join Date: Apr 2005 Location: North carolina Posts: 44	Re: 68 Radio noise Whinning that changes with the RPM. I assume its from the alternater __________________

11-09-2005, 05:57 PM	#12
Phillyfanfrombirth Registered Member Join Date: Dec 2004 Location: South Central PA Posts: 358	Re: 68 Radio noise Try contacting Crutchfield's support???

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