outside resistor 351C??
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Freshman User
Joined: Oct 2004
Posts: 41
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From: Universal City, Tx
outside resistor 351C??
Is there an outside resistor (i think thats what he called it) on a 351C. The guy I got the truck from has a switch wired to a resitor next to the soleniod and then to the coil. when I start it I have to flip the switch then start it with the key. When I shut it off I flip the switch and then the key. Just turning the key off w/o it and the engine still runs, but it wont start w/o the switch. He told me the resistor drops the volts to 9. I have never heard of this. Has anyone? Is there a way to fix it to normal? Eng is 351C, Mallory Distrib, 3/4? cam, Edelbrock manifold/carb
Thanx
Rob
Thanx
Rob
Freshman User
Joined: Apr 2004
Posts: 28
Likes: 0
I thought only points ignitions needed 9 volts to keep the points from arcing and newer electronic ignitions use 12 volts. Any body know any different? What year is your ride? The resistor may be a leftover from an old points ignition and not needed.
More Turbo
Joined: Aug 2004
Posts: 689
Likes: 6
From: Rodeo, Ca.
Originally Posted by OffOrWFO
I thought only points ignitions needed 9 volts to keep the points from arcing and newer electronic ignitions use 12 volts. Any body know any different? What year is your ride? The resistor may be a leftover from an old points ignition and not needed.
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
The DS-II OEM Ford ignition system used a ballast resistor also. That way they could get a hotter spark during cranking when full voltage was sent to the coil from a tap on the starter solenoid and it would not overheat the coil during normal operation. During cranking available battery voltage drops to around 9-10V due to line loss in the battery cables.
Check out some of these wiring diagrams:
User BB's Duraspark diagrams
https://www.ford-trucks.com/forums/member.php?u=1811
Check out some of these wiring diagrams:
User BB's Duraspark diagrams
https://www.ford-trucks.com/forums/member.php?u=1811
