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Old 04-27-2006, 09:54 AM   #1
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Why is my new ignition coil buzzing?

For a couple weeks now I've been trying to figure out what the buzz/high frequency "chirp" was that is so loud I can hear it from inside the car. Last night I busted out the stethoscope and traced it down to my weeks-old coil. I have never heard a coil make a sound before. What's the deal? Is it an annoyance or a sign of pending failure?
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Old 04-27-2006, 11:23 AM   #2
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My MSD coil buzzes a little also....I have heard this from other 5.0 owners before....as for it's effects...not sure if it is dieing or not. Being it is an electrical component, you probably can't take it back huh?

And to note (I work in the electronics industry) and it is reported that 30% of china's automotive electrical components (alts/VR's ect) are bad the minute they hit the boat to the USA. Now you know why people go through 4 orielly's alternators before they find a good one
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Old 04-27-2006, 12:14 PM   #3
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MFE, same "issue" here. I replaced my original MSD coil for a new Blaster coil. It makes a "chirp, squeek" noise.

It has been in the car since last year and hasnt failed me yet. Also makes that goofy noise when I adjusted my timing....???
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Old 04-27-2006, 03:03 PM   #4
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Wait a minute, you can hear your coil over your exhaust? I sure can't.
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Old 04-27-2006, 03:32 PM   #5
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That is suppose to be a joke, but yes, even over my 3" MAC prochamber with no tailpipes....though you have to listen very hard.
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Old 04-27-2006, 03:34 PM   #6
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I can hear my MSD ... just got it... and i have a miss/buck at 3000rpm now. Going to put my stock coil back in and see if the miss goes away (wasn't there b4)... mabey msd isn't all it's cracked up to be.

I've heard a lot of people say their MSD blaster's chirp.
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Old 04-27-2006, 04:06 PM   #7
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Seriously, they are THAT loud? Had no idea they could be that loud...
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Old 04-27-2006, 05:08 PM   #8
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It's loud enough I can hear it over the radio at reasonable volume and even at cruise with the windows closed.

I initially thought it was something with my injectors or the FPR fluttering or something but nothing proved out with the stethoscope. I also think that it's not so much that the coil itself is loud, but it's bolted to the strut tower and gets broadcast. I got my first initial "hit" with my scope when I put it on the brake distributuon block under the MC, and thought WTF? I don't have ABS so there's nothing that should be buzzing or fluttering. So I worked my way around and everything touching the strut tower sounded the buzz including the STB and the c/c plates. But it's definitely the coil.
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Old 04-27-2006, 08:20 PM   #9
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Quote:
Originally Posted by Postalbunny

I've heard a lot of people say their MSD blaster's chirp.
I totally second that!!!
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Old 04-27-2006, 08:21 PM   #10
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It`s probably electromagnetic interference EMI noise.I had the same problem with an Accel Supercoil.
I returned the Accel coil and bought a Moroso Pro Coil HO.

No noise with the Moroso coil and Moroso claims their coil outperforms all the others.
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Old 04-27-2006, 10:04 PM   #11
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my MSD blaster has done this since new & now its a few years old. dont worry about it. my exhaust is also very loud & i hear it over that. i just ingnore it. my car is so loud i cant really hear the radio ;-)
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Old 04-28-2006, 12:04 AM   #12
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my recent TFI blaster coil started making a loud pop and was arcing onto the body causing a 2,000-2,500 miss. replaced with used 1987 tfi coil and now all is quite.
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Old 04-28-2006, 01:29 AM   #13
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My MSD Coil also has the same strange Buzzing, Humming sounds also. I notice it now only if I am listening for it.
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Old 04-28-2006, 01:39 AM   #14
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Not to misslead... I can only hear it if the hood is up.. or if i REALLY listen for it, sounds like a whirrling/rubberband type noise.

clear up prev post, miss was there /w stock coil. I think my timing was too adv, 14deg, the miss only happens after car was at operating temp and had slight throttle on + 3000rpm... wot no miss, think it was pinging not misses.
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Old 04-28-2006, 10:41 AM   #15
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Quote:
Originally Posted by MFE
It's loud enough I can hear it over the radio at reasonable volume and even at cruise with the windows closed.

I also think that it's not so much that the coil itself is loud, but it's bolted to the strut tower and gets broadcast.
Right - same here with the "Blaster". I found some small, nylon-like "washers" in my scrap drawer and put those between the coil and strut-tower mount points. Definitely helped. FWIW - I've had mine for just over 2 years and 23,000 miles with no issues...
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Old 04-28-2006, 11:31 AM   #16
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Mine is quiet?
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Old 04-28-2006, 11:37 AM   #17
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Quote:
Originally Posted by Blk88GT
Mine is quiet?
A quiet MSD Blaster? That thing's going to fail... and fail soon! LOL!
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Old 04-28-2006, 11:54 AM   #18
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I guess a rubber mount is in your future for you buzzers huh? SOunds fishy though, maybe someone should call MSD and ask them about this issue...that have to know about it....
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Old 04-28-2006, 11:58 AM   #19
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Quote:
Originally Posted by SilverFoxbody
I guess a rubber mount is in your future for you buzzers huh? SOunds fishy though, maybe someone should call MSD and ask them about this issue...that have to know about it....
Yes - they know about it. If I recall - the MSD installation instructions even suggust you "insulate" the coil from the body/shock tower....
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Old 04-28-2006, 01:39 PM   #20
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Quote:
Originally Posted by Mark Harrell
Yes - they know about it. If I recall - the MSD installation instructions even suggust you "insulate" the coil from the body/shock tower....
Which in my case, didn't help a bit. I could hear mine over my exhaust and stereo. I dumped it and went back to stock. Many, many people complain about this and it seems hit or miss--some make noise and some don't--but it doesn't seem to affect their performance or longevity.
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Old 04-28-2006, 03:29 PM   #21
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I will try to describe what I did to quiet mine, the coil itself is in the middle of the metal brace that goes around it, the coil part is loose and can be moved around, so I used a couple plastic tie-wraps to secure it to the metal outer part and it reduced it.
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Old 04-28-2006, 03:45 PM   #22
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Quote:
Originally Posted by Shakerhood
I will try to describe what I did to quiet mine, the coil itself is in the middle of the metal brace that goes around it, the coil part is loose and can be moved around, so I used a couple plastic tie-wraps to secure it to the metal outer part and it reduced it.
A-ha...now that you mention it, the plastic part I moved from my old coil to this one did seem a little loose when I installed it on this one.
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Old 04-28-2006, 06:50 PM   #23
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Quote:
Originally Posted by Shakerhood
I will try to describe what I did to quiet mine, the coil itself is in the middle of the metal brace that goes around it, the coil part is loose and can be moved around, so I used a couple plastic tie-wraps to secure it to the metal outer part and it reduced it.
I dropped some epoxy down the center of mine. Now there is no slop between the actual coil and the core. Mine never made much noise, but now I have to be within six inches to hear any 'tick'.
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Old 04-29-2006, 12:53 AM   #24
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Quote:
Originally Posted by MFE
A-ha...now that you mention it, the plastic part I moved from my old coil to this one did seem a little loose when I installed it on this one.

When I first bought the MSD Coil I returned it to Summit because it was loose, so I thought it was bad. Summit sent out a new one and it was the same so I called MSD and they said they are all like that. The Factory one is nice and firm, that is why I tie wrapped mine off.
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