MSD Noise

MSD Digital Ignition Programming & Troubleshooting, Playing with Dots, Slew and other fun toys for traction challanged racers

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Craig W.
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MSD Noise

#1 Post by Craig W. » Fri Nov 05, 2010 10:43 pm

My buddy Bruce (the other half of 2QuickNovas.com) has a MSD 6 BTM box. Its making a high pitched noise and he's also getting a lot of interference through the radio. Didn't do this before. The car has been sitting for a while and now has the noise issues.

I'm thinking possibly a bad ground. Anybody seen this before and know what the cure is?
Craig Watson
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71Hellride
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Re: MSD Noise

#2 Post by 71Hellride » Sun Nov 07, 2010 10:07 am

Yes, my 7al would whine all the time. I bought it used but it never seen to hurt anything. I didn't have a radio in it so I can't comment on that, but MSD said it's a ground and/or noise issue. They sell the ground filters that's supposed to eliminate the feedback, but I don't know how well they work.

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ytnova
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Re: MSD Noise

#3 Post by ytnova » Sun Nov 07, 2010 10:57 am

After you check the routing of the wiring and the connections, see if the power or the ground is sharing a connection with something else, sometimes the noise can bleed over from something else. On the late model GM stuff that still has a cap and rotor, 4.3, 5.7, etc. we get a lot of noise just before the cap and rotor burns through or a spark plug wire starts to short to ground.
I am not really sure what the question is, but I am pretty sure the answer is Big Block.

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Craig W.
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Re: MSD Noise

#4 Post by Craig W. » Sun Nov 07, 2010 1:43 pm

Thanks for the info guys. I'll pass it along to him.
Craig Watson
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bracketracer
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Re: MSD Noise

#5 Post by bracketracer » Wed Dec 08, 2010 7:57 pm

The ground should go to the battery

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CDR Performance
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Re: MSD Noise

#6 Post by CDR Performance » Thu Dec 09, 2010 6:02 am

As said check the grounds.
Does it have a woven ground/braided also?
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Craig W.
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Re: MSD Noise

#7 Post by Craig W. » Thu Dec 09, 2010 12:40 pm

I don't know how he has his grounds run. He's a good friend but lives in Minnesota. I haven't seen the car since 2001.

Not sure if he's had a chance to look into it more or not. Over a foot of snow on the ground up there now he says, so I'm sure he's done playing for a few months.

Thanks.
Craig Watson
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