ignition help?
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Senior User
Joined: Aug 2003
Posts: 144
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From: tacoma-wa
ignition help?
so i have seemed to stump myself. I have a 73 f250 360 motor. this motor has been built and i have wired and had running in three different trucks. so I really
seem confused. the truck has no other wiring besides the ignition and charging system. I had it going the other day and it died so i determined it wasnt charging. took the alternator out and that was all ok so the truck would still start and run at this point. so I switched out regulators and just couldn't get it working. so started going through everything from the ignition swithc to coil all the wires. somewhere i have got something backwards or not hooked back up. I have no power coming out of my coil, i do have power to the coil. so i have switched out coils i had about 5 other good ones laying around. still nothing. could someone rundown the essentials to make this thing run. oh and it has a pertronix and all that wiring and grounding seems fine.
thanks for any help
justin
seem confused. the truck has no other wiring besides the ignition and charging system. I had it going the other day and it died so i determined it wasnt charging. took the alternator out and that was all ok so the truck would still start and run at this point. so I switched out regulators and just couldn't get it working. so started going through everything from the ignition swithc to coil all the wires. somewhere i have got something backwards or not hooked back up. I have no power coming out of my coil, i do have power to the coil. so i have switched out coils i had about 5 other good ones laying around. still nothing. could someone rundown the essentials to make this thing run. oh and it has a pertronix and all that wiring and grounding seems fine.
thanks for any help
justin
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Joined: Jan 2001
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From: Virginia
Get a testlight or voltmeter. I think you said you do have power on the coil + with the key in run and start, but check it again anyway by putting the + probe on the + of the coil, and the neg probe on the engine block.
Once you have verified that, then leave the neg on the engine block, and move the + probe to the neg coil terminal. While doing this, crank the engine. The voltage should go up and down or the testlight should blink when the engine turns. If it doesn't, then your pertronix box is burnt out or has some other problem. If you saved the points(you should have them in the glovebox) then you can put them back in and see if it will run.
Once you have verified that, then leave the neg on the engine block, and move the + probe to the neg coil terminal. While doing this, crank the engine. The voltage should go up and down or the testlight should blink when the engine turns. If it doesn't, then your pertronix box is burnt out or has some other problem. If you saved the points(you should have them in the glovebox) then you can put them back in and see if it will run.
Thread Starter
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Senior User
Joined: Aug 2003
Posts: 144
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From: tacoma-wa
so i put a mallory hyfire control box and a new accel coil new platinum plugs. i get spark through the coil but it wont fire, nothing out of distributor. its gotta be the pertronix?? im guessing. anyone know a good place to get a replacement? or is this something the autoparts store would have?
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Joined: Jan 2001
Posts: 56,995
Likes: 2,741
From: Virginia
I would buy a set of points and stick them back in to try. Like I said, most people keep a set of points in the glove box in case they are in tenbucktoo and get stranded by a blown pertronix unit. I believe LMC truck and other aftermarket people sell the pertronix.
