Voltage problems, please help!!!
06-13-2005 | 06:23 PM
#1
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Joined: Aug 2003
Posts: 133
Voltage problems, please help!!!
I need some opinoins here guys, I am at a loss??? 
I installed a MSD 6A and a MSD coil, along with the MSD GM harness. I have had trouble ever since. First of all I can hear a loud clicking noise inside th ecar, I first mistook it for valvetrain noise. But I now realize it is comnig from the passenger side of the dashboard, which is where I have the MSD mounted in the engine bay. I am also experiencing a voltage drop, the voltage gauge drops down to the redline, as if the alternator has given out, and the stock tach is spiking up and down like crazy. And last but not least the car is idling very high.
Other than all that the car runs fine, pulls hard and has no issues. I shoud mention how I have it all installed I guess. The MSD 6A is on the firewall where the A/C box used to be. I have the postive run to the starting motor and the negative run to a location on the firewall where other grounds are run. It is a stock location on the passenger side of the distributor. The coil is mounted on the "new" heater box that I installed. But it is very close to the valve cover because of the length of the wires.
Should I run the MSD the way the instructions call for, the postive to the postive battery, and the ground to the negative battery? Should I mount the coil somewhere else because it may be getting to hot next to the valve cover? Should I put another ground on the MSD? Another ground on the alternator or the battery?
I am lost, please help!!!
I installed a MSD 6A and a MSD coil, along with the MSD GM harness. I have had trouble ever since. First of all I can hear a loud clicking noise inside th ecar, I first mistook it for valvetrain noise. But I now realize it is comnig from the passenger side of the dashboard, which is where I have the MSD mounted in the engine bay. I am also experiencing a voltage drop, the voltage gauge drops down to the redline, as if the alternator has given out, and the stock tach is spiking up and down like crazy. And last but not least the car is idling very high.
Other than all that the car runs fine, pulls hard and has no issues. I shoud mention how I have it all installed I guess. The MSD 6A is on the firewall where the A/C box used to be. I have the postive run to the starting motor and the negative run to a location on the firewall where other grounds are run. It is a stock location on the passenger side of the distributor. The coil is mounted on the "new" heater box that I installed. But it is very close to the valve cover because of the length of the wires.
Should I run the MSD the way the instructions call for, the postive to the postive battery, and the ground to the negative battery? Should I mount the coil somewhere else because it may be getting to hot next to the valve cover? Should I put another ground on the MSD? Another ground on the alternator or the battery?
I am lost, please help!!!
06-13-2005 | 08:17 PM
#2
Registered User
Joined: May 2005
Posts: 79
Re: Voltage problems, please help!!!
As far as mounting the wires from the MSD, i'd put the positive to the positive side of the battery and the ground to where the rest of the grounds run. And as for over heating the coil, i don't know, sorry. 
06-18-2005 | 12:22 PM
#4
Registered User
Joined: May 2005
Posts: 28
Re: Voltage problems, please help!!!
that sounds like a ground problem to me. Thoses things need a really good ground. Make sure that where you ran the ground to there is no rust or corrosion in behind all the other grounds and no paint. Make sure that it is metal on metal. If I were you I would run the groun right to the battery like it said because your battery is grounded very well. Try that and let us know what happens.
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