Ignition Coil Buzzing

[phish1270]

Guys,

I have been a member for a few years but I owned a '65 Barracuda for the last 6 years so I spent most of my time on FABO. I recently sold the Barracuda & just bought a '67 Charger. It is a 383, 2 barrel car, auto.
I just got the car home yesterday & while working on it last night my boys noticed a buzzing noise under the hood when the key was in the Accessory position (on). I started snooping around, it sounded like it was coming from the distributor. The noise is there even without the car running. I popped the cap off & nothing looked out of the ordinary, still made the noise. Next I disconnected both wires running to the coil, noise stopped. Interesting. . . . I grabbed another coil that I had & put it on. Turn the key on, coil is buzzing. Ok, so it appears to not be the coil.
Anyone have any suggestions? I have never had a coil buzz before. I have had the car for less than 24 hours at this point, just trying to make sure nothing bad (fire, coil explodes) happens. Any ideas are appreciated. Thanks

Glenn

 

[miller]

Sounds like something is wired wrong.

Suggest you trace ALL ignition wiring, from fuse box out.

 

[eric383]

There should be no power to the coil when the key is in the acc position I believe. I would think power to the coil in just the ign or start position. If you have points what happens if you take off the + wire to the coil and run a jumper from the battery to the + on the coil? Just don't run it long because you should have a ballast resistor in the circuit. If it still buzzes I would look at the - side of the circuit. What type of ignition? Points or some kind of electronic? Old cars sure keep you busy don't they?

 

[phish1270]

Car was converted to electronic ignition. I retraced all of the conversion wires & everything is wired correctly. Just have to keep checking things I guess.

 

[phish1270]

Looks like it was a bad control module. Swapped one in that I had on the shelf & no more buzzing. That was a new one. Thanks

 

[mopar 3 B]

Their should not be current to the box with the ignition off. Think you solved the noise problem but not the real issue. Pull the plug on the ECU with the ignition off there should be no voltage at any off the terminals with the ignition switch off if wired correctly. Also make sure no other device has been grounded to the ECU, this should be a body ground only.

 

[phish1270]

Ran through all the tests above & nothing seems to be wired incorrectly. No voltage at any terminals with ignition off. Seems to be all good now (hopefully). One problem down, too many to count still left. . . .
Thanks.