Coil Voltage Question
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Senior User
Joined: Apr 2005
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From: Lynchburg, VA
Coil Voltage Question
81 F150, 351m 4x4 Auto.
Ok,
I know that a stock coil should run at 6 volts. I upgraded to an Accel super coil that operates at 12V constant. So I swapped out the resistor wire for a standard wire to supply 12V constant to the coil.
When I measure the voltage from the ground of the truck (not the coil side) and the (+) side of the coil I read 12V.
When i measure the voltage between the (-) and (+) sides of the coil I get about 9-10V.
Any ideas why this would happen?
Ok,
I know that a stock coil should run at 6 volts. I upgraded to an Accel super coil that operates at 12V constant. So I swapped out the resistor wire for a standard wire to supply 12V constant to the coil.
When I measure the voltage from the ground of the truck (not the coil side) and the (+) side of the coil I read 12V.
When i measure the voltage between the (-) and (+) sides of the coil I get about 9-10V.
Any ideas why this would happen?
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Joined: Jan 2008
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Ford Coil voltage is actually 8.2 volts minimum
What is the voltage from - terminal of coil to ground ?
- is the tach reading which means ...grounded then open..then grounded.
What is the continuity test result between those two terminals ?
http://www.fluke.com/application_not...AGID=1&SID=103
That is more important
What is the voltage from - terminal of coil to ground ?
- is the tach reading which means ...grounded then open..then grounded.
What is the continuity test result between those two terminals ?
http://www.fluke.com/application_not...AGID=1&SID=103
That is more important
Thread Starter
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Senior User
Joined: Apr 2005
Posts: 125
Likes: 0
From: Lynchburg, VA
Holy cow...my accel super coil exploded. Literally....it blew up. I guess the coil was damaged when it was shipped to me and I did not know it. That is what I get for buying one off eBay.
Anyway, I went to autozone and got another coil. But now there is no negative polarity on the coil. (+) side of coil to chassis ground = 12V. (+) side of coil to (-) side of coil = 0V.
Now what. When the old coil blew did it take out the ignition module?
Anyway, I went to autozone and got another coil. But now there is no negative polarity on the coil. (+) side of coil to chassis ground = 12V. (+) side of coil to (-) side of coil = 0V.
Now what. When the old coil blew did it take out the ignition module?
Last edited by VirginiaWiFinder; Dec 30, 2006 at 09:34 PM.
