duraspark question
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Freshman User
Joined: Jan 2005
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thanks for the quick reply... i have 74 f250 4x4 360
i have read lots of post about the dura spark and it seems there were more than 1 kind... 1,2,3 witch one would be ok to use for my 74 and also what coil will i be needing
Thanks
Danny
i have read lots of post about the dura spark and it seems there were more than 1 kind... 1,2,3 witch one would be ok to use for my 74 and also what coil will i be needing
Thanks
Danny
Elder User
Joined: Jun 2003
Posts: 886
Likes: 1
From: Houston/Hope BC
Blue grommet DSII, @ Autozone. (78MY400 will pull it up, Wells brand is a good module) They also have the distributor, but will likely have to order it (rebuilt). You'll need to hit a yard for the connectors. AZ has an Accel coil for around $20-25? that is an improvement over stock. Wiring diagrams are all over the net.
Post Fiend
Joined: Jul 2004
Posts: 8,786
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From: Northern California
Originally Posted by Ecuri
Blue grommet DSII, @ Autozone. (78MY400 will pull it up, Wells brand is a good module) They also have the distributor, but will likely have to order it (rebuilt). You'll need to hit a yard for the connectors. AZ has an Accel coil for around $20-25? that is an improvement over stock. Wiring diagrams are all over the net.
If you don't have any luck at the yard, you can also buy connectors from some parts stores, if not whole harnesses. I know Napa used to carry them. You could also look at one of the sponsor sites too.
Good luck.
New User
Joined: Jan 2008
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Have a look here for an illustration for the duraspark Ign.
http://www.clubfte.com/users/mil1ion...strations.html
http://www.clubfte.com/users/mil1ion...strations.html
Last edited by Mil1ion; Aug 10, 2005 at 11:38 AM.
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More Turbo
Joined: Nov 2003
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I beleive the box on my 79 says "switches", the one I got at the junk yard says "Motorola", it has fins on it.They had another thay said "standard",all had the bule connector on it. Not bad for 10$,at Autozone the Wells one was 24$.
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Just so you know, swapping harnesses involves pulling behind the dash, too. There are some tricks as different years used different connectors at various things. For example, the guages are different, so getting one that will connect can be tricky. If everything else is in good shape, just solder in the connectors. The reason I say this is because I did this, and ended up swapping all kinds of stuff to get it to work.
Fleet Mechanic
Joined: Mar 2004
Posts: 1,398
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From: Hesperia, CA
Late 74 started the DuraSpark There wasn't too many DuraSpark I's out there, but I would go to a wrecking yard and find a 77 to 79 and get the entire DuraSpark II system. My son did this with his. You only need the engine compartment wiring complete with the plugs for the module and dist. Get the wiring diagram to show where to hook up the wires for the cab. It is a very simple setup. (Be sure you get a distributor for your size engine)
Elder User
Joined: Jun 2003
Posts: 886
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From: Houston/Hope BC
If memory serves right, my long gone 87 F-150 still had duraspark.
Does anyone know if the points system used a ballast resistor and if the value is the same as the DSII? (Or if it matters?)
Does anyone know if the points system used a ballast resistor and if the value is the same as the DSII? (Or if it matters?)
Fleet Mechanic
Joined: Mar 2004
Posts: 1,398
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From: Hesperia, CA
Originally Posted by Ecuri
If memory serves right, my long gone 87 F-150 still had duraspark.
Does anyone know if the points system used a ballast resistor and if the value is the same as the DSII? (Or if it matters?)
Does anyone know if the points system used a ballast resistor and if the value is the same as the DSII? (Or if it matters?)
The Dura Spark 1 did not have a ballast resistor all the rest did. As far as I know the ballast resistor (or wire) was pretty much standard at 1.5 ohms. You should have about 7.5 volts at the coil when running and full voltage when starting. If you are somewhere in this range you will be ok.
FTE Leadership Emeritus
Joined: Jul 2002
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From: Long Island USA
Originally Posted by wb6vvv
Dura Spark went right up to EFI and beyond, the 87 had Sura Spark III which had the Crankshaft Position Sensor. (CPS) They started the CPS in 1982. They had the Dura Spark I and Dura Spark II in 1977. They just called it a breakerless ignition system before that. Dura Spark I was for California it basically ran the coil hotter. I think this is why some people have coil problems because they get the two mixed up.
The Dura Spark 1 did not have a ballast resistor all the rest did. As far as I know the ballast resistor (or wire) was pretty much standard at 1.5 ohms. You should have about 7.5 volts at the coil when running and full voltage when starting. If you are somewhere in this range you will be ok.
The Dura Spark 1 did not have a ballast resistor all the rest did. As far as I know the ballast resistor (or wire) was pretty much standard at 1.5 ohms. You should have about 7.5 volts at the coil when running and full voltage when starting. If you are somewhere in this range you will be ok.
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