MSD replacement coil causing whining noise?

Redro · May 25th, 2007, 11:38 PM

Hey Guys,
I just installed a new coil in my 5.0l LX . A MSD TFI coil which is a replacement for the stock coil. It puts out 148,000 volts...not sure what stock puts out though. Starting her up right after the install there is a high whining, ticking kind of sound. I went around the block and she pulls really nice, throttle response is good, idles good as well but the sound is quite evident. Has anybody experienced this or know why it is doing this. I had the same experience with a new Accel coil awhile back and returned it thinking it was defective. Any thoughts ....thanks.

tdf · May 26th, 2007, 12:52 AM

If by chance your radio is on during the ride, the noise may be coming from the radio. Most coils need a condenser to filter the RF noise from interfering with the radio. If not that, then I have no clue. That voltage output seems very high. Are you sure it's not 48000?

jam77 · May 26th, 2007, 12:56 AM

Im running that same coil and dont have any noise. Not sure on that one.

fogged306 · May 26th, 2007, 12:59 AM

Originally Posted by tdf

If by chance your radio is on during the ride, the noise may be coming from the radio. Most coils need a condenser to filter the RF noise from interfering with the radio. If not that, then I have no clue. That voltage output seems very high. Are you sure it's not 48000?

Haha, yea thats actually a good point. If you happen to have an aftermarket radio and it is on with the volume low sometimes you can hear a high pitched whine through the speakers when you do things like that.

Redro · May 26th, 2007, 01:22 PM

I think I did misinterpret . It is actually 48,000 volts not 148,000.
Nonetheless the noise is still present. The stereo , running two amps is not affected. It plays without any interference. The noise is there instantly upon start-up.

Jam77 did you notice a difference in throttle response? Just curious. Will keep looking for answers. Thanks.

fogged306 · May 26th, 2007, 02:23 PM

Not to be a stickler here, but are you POSITIVE it isnt coming through the speakers? Now that i see you are running amps, it makes me think that is really the issue. I've seen that 100's of times, I've been installing stereos for about 10yrs. and its an extremely common problem. Actually put your ears to the speakers and listen to them with the radio on but volume at 0. rev the motor a little, does the whine go up in pitch with RPM's?

If you have done this already, completely disregard this.

Redro · May 26th, 2007, 02:47 PM

The noise is there without the stereo even being on and it is definitely coming from the engine compartment..

cams-shelbycobra07 · May 26th, 2007, 06:24 PM

my 0ld 2006 gt would howl and so would my dads old f-150 it had to do with the limited slip and the rear end going out. NOT sure if its the same on the old mustangs but just a suggestion

TurboLX · May 26th, 2007, 06:51 PM

Originally Posted by cams-shelbycobra07

my 0ld 2006 gt would howl and so would my dads old f-150 it had to do with the limited slip and the rear end going out. NOT sure if its the same on the old mustangs but just a suggestion

then it wouldnt howl, and what is it with you, you post whoring to get your count up, because you've posting all kinds of wrong info...

i say call MSD themselves and see what they can do for you

SALIV8 · May 26th, 2007, 07:11 PM

msd sends invisible blowers now with their coils. Its just boostin.

hahaha, sorry, but i had to.

usmcsawgunner · May 26th, 2007, 08:42 PM

i have a rich daddy and he bought me a new 2007 shelby cuz i didnt like the smell of my 2006 and i have no clue what the difference is from rearends to coils....
im sorry that wasnt meant to be a direct attack on you man...
i had to just like saliv8

Redro · May 27th, 2007, 03:23 PM

The limited slip diff thing has no relation to my issue at all..
I have sent MSD tech a mail ...hopefully they can shed some light on this.
Thanks for the suggestions...

Racinjason81 · May 28th, 2007, 01:03 AM

My MSD TFI coil does it to ,It seems to be a common thing with these
coils .

Redro · May 29th, 2007, 10:32 PM

Hey Jason,
At least someone else is experiencing the same problem. What have you done to remedy it. Does your car run fine with the noise. Also do you notice an increase in throttle response. I have not heard back from MSD yet. Might have to give them a call. Will post their reply.

Redro · May 30th, 2007, 09:54 PM

Just got a reply from MSD Tech ...He says, the noise is normal with the MSD coil. This is caused by the frequency
in which the MSD coil is operating at. His words exactly.

May 25th, 2007, 11:38 PM	#1
Redro Newbie Join Date: May 2007 Posts: 13	MSD replacement coil causing whining noise? Hey Guys, I just installed a new coil in my 5.0l LX . A MSD TFI coil which is a replacement for the stock coil. It puts out 148,000 volts...not sure what stock puts out though. Starting her up right after the install there is a high whining, ticking kind of sound. I went around the block and she pulls really nice, throttle response is good, idles good as well but the sound is quite evident. Has anybody experienced this or know why it is doing this. I had the same experience with a new Accel coil awhile back and returned it thinking it was defective. Any thoughts ....thanks.

May 26th, 2007, 12:56 AM	#3
jam77 Enthusiast 1987 Mustang GT Join Date: Apr 2007 Location: IL Posts: 685	MSD replacement coil causing whining noise? Im running that same coil and dont have any noise. Not sure on that one.

May 27th, 2007, 03:23 PM	#12
Redro Newbie Join Date: May 2007 Posts: 13	The limited slip diff thing has no relation to my issue at all.. I have sent MSD tech a mail ...hopefully they can shed some light on this. Thanks for the suggestions... __________________ 1992 Mustang LX

May 28th, 2007, 01:03 AM	#13
Racinjason81 Hardcore Enthusiast Join Date: Feb 2007 Location: New jersey Posts: 1,559	My MSD TFI coil does it to ,It seems to be a common thing with these coils . __________________ Heres a real funny video youtube.com/watch?v=ojB7KkaR03I VTEC stands for Very Torqueless Economy Car Honda stands for Hold On Not Done Accelerating 1991 LX 5.0 H/B(T-70 turbo coming soon)

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May 26th, 2007, 12:52 AM	#2
tdf Newbie Join Date: May 2007 Posts: 42	If by chance your radio is on during the ride, the noise may be coming from the radio. Most coils need a condenser to filter the RF noise from interfering with the radio. If not that, then I have no clue. That voltage output seems very high. Are you sure it's not 48000?

May 26th, 2007, 01:22 PM	#5
Redro Newbie Join Date: May 2007 Posts: 13	I think I did misinterpret . It is actually 48,000 volts not 148,000. Nonetheless the noise is still present. The stereo , running two amps is not affected. It plays without any interference. The noise is there instantly upon start-up. Jam77 did you notice a difference in throttle response? Just curious. Will keep looking for answers. Thanks.

May 26th, 2007, 02:23 PM	#6
fogged306 Hardcore Enthusiast 89 GT Join Date: Apr 2007 Location: Happy? Posts: 1,304	Not to be a stickler here, but are you POSITIVE it isnt coming through the speakers? Now that i see you are running amps, it makes me think that is really the issue. I've seen that 100's of times, I've been installing stereos for about 10yrs. and its an extremely common problem. Actually put your ears to the speakers and listen to them with the radio on but volume at 0. rev the motor a little, does the whine go up in pitch with RPM's? If you have done this already, completely disregard this.

May 26th, 2007, 02:47 PM	#7
Redro Newbie Join Date: May 2007 Posts: 13	The noise is there without the stereo even being on and it is definitely coming from the engine compartment..

May 26th, 2007, 06:24 PM	#8
cams-shelbycobra07 Enthusiast 1991 LX, 2003 SNK, 2007 S 11.3 Join Date: Dec 2006 Location: Oklahoma City Posts: 956	my 0ld 2006 gt would howl and so would my dads old f-150 it had to do with the limited slip and the rear end going out. NOT sure if its the same on the old mustangs but just a suggestion

May 26th, 2007, 07:11 PM	#10
SALIV8 Enthusiast Join Date: Dec 2006 Location: the MURDER CAPITOL Posts: 520	msd sends invisible blowers now with their coils. Its just boostin. hahaha, sorry, but i had to.

May 26th, 2007, 08:42 PM	#11
usmcsawgunner Regular 1993 Mustang GT 13.2 @98.54 Join Date: Apr 2007 Location: Kaneohe Bay, Hawaii Posts: 433	i have a rich daddy and he bought me a new 2007 shelby cuz i didnt like the smell of my 2006 and i have no clue what the difference is from rearends to coils.... im sorry that wasnt meant to be a direct attack on you man... i had to just like saliv8

May 29th, 2007, 10:32 PM	#14
Redro Newbie Join Date: May 2007 Posts: 13	Hey Jason, At least someone else is experiencing the same problem. What have you done to remedy it. Does your car run fine with the noise. Also do you notice an increase in throttle response. I have not heard back from MSD yet. Might have to give them a call. Will post their reply.

May 30th, 2007, 09:54 PM	#15
Redro Newbie Join Date: May 2007 Posts: 13	Just got a reply from MSD Tech ...He says, the noise is normal with the MSD coil. This is caused by the frequency in which the MSD coil is operating at. His words exactly.

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