Duraspark II Ignition
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Elder User
Joined: Apr 2010
Posts: 645
Likes: 2
From: Richlands, NC
Thanks! XD
The reason for the scream? The first few times i've hooked that thing up and tried to use it? It didn't work.
That's the first time i've pushed the button and it worked. XD
Cargo Master
Joined: Dec 2004
Posts: 3,362
Likes: 22
From: Florence, SC
Originally Posted by Wicked Endings
If you follow the wire, it goes and get's into this "clip/plug" thing then continues down next to the spark plugs, where it is part of this box thing with 3 or 4 wires. Then, that box thing goes and plugs into this small cylinder thing next to the coil, and the other wire goes into this whole bunch of wires...
Originally Posted by Wicked Endings
Now, about that large vacuum hose, there is no hose. However, on that box thing, there is one "hose" type thing that goes underneath the truck and starts heading towards the back. My guess is the gas tank from what you told me.
More Turbo
Joined: Apr 2018
Posts: 732
Likes: 59
From: pine city washington
i am working on a 85 f250 with a 460 engine and it has a durasprk ign and the round coil. it has been sitting for 15 years no spark no fuel pump. put a new from amazon, ign box and it sparked for a while. then i left the key on and came back a week later . battery was dead and there was no spark when i took the battery out to charge it and put it back in called all around, and nobody checks them anymore. too old. . how do i check the ign box without specialty tools? it has 7.5 volts on the positive side of the coil in run and 12v in start.
FTE Legend
Joined: Nov 2015
Posts: 30,915
Likes: 4,123
From: Angier, NC
Sorry to say if the key was left on even for a few hours and it is not running the box burns out.
Being you left it on for a week I would call it (well done) toast and just get another new one and dont leave the key on not running
BTW even if the store could check it, it can check good but still be bad. This is a problem when it has spark but dies going down the road and after sitting a few mins. or an hour it will start and run again for a bit.
This happens because the box heats up and stops sparking. You pull it take to the store when it is cold and you have spark so you put it back in and the same thing happens, heats up no spark.
BTW II: you dont want to go with the cheap on the box - you get what you paid for and could fail in a short time.
God luck
Dave ----
Being you left it on for a week I would call it (well done) toast and just get another new one and dont leave the key on not running
BTW even if the store could check it, it can check good but still be bad. This is a problem when it has spark but dies going down the road and after sitting a few mins. or an hour it will start and run again for a bit.
This happens because the box heats up and stops sparking. You pull it take to the store when it is cold and you have spark so you put it back in and the same thing happens, heats up no spark.
BTW II: you dont want to go with the cheap on the box - you get what you paid for and could fail in a short time.
God luck
Dave ----
Cargo Master
Joined: Mar 2008
Posts: 2,569
Likes: 207
From: Washington
i am working on a 85 f250 with a 460 engine and it has a durasprk ign and the round coil. it has been sitting for 15 years no spark
SNIP.......
. how do i check the ign box without specialty tools? it has 7.5 volts on the positive side of the coil in run and 12v in start.
SNIP.......
. how do i check the ign box without specialty tools? it has 7.5 volts on the positive side of the coil in run and 12v in start.
The 7.5 volt reading proves the ignition module is still being powered ON. And passing current as it should.
Also, the primary ignition circuit is intact, all the way to the ground point inside the distributor.
The coil will (should) get warm when you leave the key ON.
There's a way to generate a single voltage pulse from the distributor to the ignition module. You hit the side of the distributor, with the plastic end of a screwdriver, near the magnet pickup. This is supposed to shock the magnet and generate a single voltage pulse. The coil then should output 1 spark per whack.
Full disclosure.... I have not done this test but other smart people have said it's in the manual and it works. Good luck with this. Let everyone know if the test works.
Jim
Last edited by JimsRebel; Apr 10, 2026 at 01:11 PM.
More Turbo
Joined: May 2003
Posts: 520
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Cargo Master
Joined: Mar 2002
Posts: 3,132
Likes: 219
From: W (BY GOD) V
Cargo Master
Joined: Mar 2002
Posts: 3,132
Likes: 219
From: W (BY GOD) V
SORRY FOR THE DBL POST - I INADVERTENTLY LEFT MY REVERB ON ...
Did Anyone Notice My REFERRING URL to a GENUINE FORD ICM?
FORD ICM - DS II - 1U2Z 12A199-AA (BLUE STRAIN RELIEF) - Current FORD Service Repl Part
Last edited by KULTULZ; Apr 12, 2026 at 08:53 AM.
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Cargo Master
Joined: Mar 2008
Posts: 2,569
Likes: 207
From: Washington
https://www.ebay.com/itm/28719619445...tevZw&LH_BIN=1
This is the one I would recommend. Not sure if it's still available at the local Napa stores.
Back in my junkyard cruising days I would always buy these if I found them. But only if they looked exactly like the photo above. If I recall correctly they were $6 used.
I felt it was the best new part option available, and at that time Napa auto parts stores charged about $70 for them.
Good luck, Jim
Last edited by JimsRebel; Apr 11, 2026 at 12:20 PM.
Cargo Master
Joined: Mar 2008
Posts: 2,569
Likes: 207
From: Washington
https://www.ebay.com/itm/25234530331...WNKD1QQZ8FKWQX
GM 4 PIN ignition module used to be a popular thing for "us cheap folks", this one is $11 with free shipping.
I used this system for over 10 years with my original square coil on an 1986 F150.
But then, for me, the primary challenge isn't just to fix the truck ... But to fix it with whatever I have in my junk drawer and of course not spending any money.
Jim
GM 4 PIN ignition module used to be a popular thing for "us cheap folks", this one is $11 with free shipping.
I used this system for over 10 years with my original square coil on an 1986 F150.
But then, for me, the primary challenge isn't just to fix the truck ... But to fix it with whatever I have in my junk drawer and of course not spending any money.
Jim
FTE Legend
Joined: Nov 2015
Posts: 30,915
Likes: 4,123
From: Angier, NC
Today was over 60 miles pulling a 20' enclosed trailer and 2 weeks ago 240 miles round trip to drag back a Jeep.
Dave ----
I think you would be lucky if it worked out of the box 
Cargo Master
Joined: Mar 2002
Posts: 3,132
Likes: 219
From: W (BY GOD) V
As for a GM (or HU FLUNG DUNG OFF-SHORE SLOPPY COPY) HEI MODULE ...
If you want hot, use a TFI E-COIL. Changeover is fairly simple.
You can also modify a DURASPARK DIST using PERTRNIX. IGN II or III will light your fire.
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