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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

300-6 Idle miss

 
  #16  
Old 01-26-2019, 04:12 PM
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We went over this a month or two ago, but I can't remember the details. I think you are correct, those are the plugs. Can you make out the colors of the wires to each plug. I don't have time right this minute, but here are the two diagrams, you have the 4.9 EEC and you want to go to duraspark II. I checked off the connectors and their wire colors, I want to say they will plug in but it needs to be verified again first by the diagrams below.




 
  #17  
Old 01-26-2019, 04:18 PM
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Ok, I have a little bit of time here before I leave. I see connector c321 in both diagrams. It has a red/lightblue in both diagrams for a cranking or start signal.

c321 also has a white/lightblue that is a 12v ignition on signal for both systems.
 
  #18  
Old 01-26-2019, 04:20 PM
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c325 has a red/lightgreen wire that feeds the coil on both systems. Someone check me, I don't see much else there so far.
 
  #19  
Old 01-26-2019, 06:00 PM
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I will get the wire colors on mine in the morning when I have more light to see with. The salvage yard guy said this swap was a pretty popular one, as he had just the one truck that had the set up still in it that I bought today
 
  #20  
Old 01-27-2019, 09:24 AM
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Here are the wire colors on the plugs on my '84, they're badly faded so I did the best I could

4 prong plug harness side:
White/red stripe
Red
Black/pink stripe
Red/yellow hash marks

3 prong plug harness side:
Red/light blue stripe
Tan/ light blue hash marks
Tan
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~
4 prong plug firewall side
Red/Yellow stripe
Red/grey stripe (may be green was badly faded)
Red/white stripe
White

3 prong plug firewall side
White/light blue stripe
White
Red/tan stripe
 
  #21  
Old 01-27-2019, 09:45 AM
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There are several "How To" s in the Stickies for the Conversion to DSII

Link => HOWTO - DSII Conversion (swap from TFI or EECIII / EECIV to DSII)
 

Last edited by Wagonboy; 01-27-2019 at 09:46 AM. Reason: clarity
  #22  
Old 01-27-2019, 11:07 AM
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Originally Posted by Wagonboy View Post
There are several "How To" s in the Stickies for the Conversion to DSII

Link => HOWTO - DSII Conversion (swap from TFI or EECIII / EECIV to DSII)
I saw those, wish they had photos, but I think I can make use of them
 
  #23  
Old 01-27-2019, 12:22 PM
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I am almost positive this will be plug and play. Not 100% though, I have never done it myself. But if you print that duraspark II schematic out, and see which color wires are shown on each side of the connectors in the schematic and the plugs themselves, it think it will work out. I would think Ford would have made it easy on themselves to run the trucks down the assembly line back to back,, with the different ignition systems just plugging in.
 
  #24  
Old 01-29-2019, 07:15 PM
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It was plug n play on my 86 other than coil connector. You can use the original coil if you want (save old coil-to-cap wire!)
 
  #25  
Old 01-29-2019, 07:34 PM
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Originally Posted by jackietreehorn View Post
It was plug n play on my 86 other than coil connector. You can use the original coil if you want (save old coil-to-cap wire!)
That makes sense, the duraspark II coil is round, the TFI takes the square coil. I like keeping the system original, I am a proponent of the round coil with the duraspark system.

 
  #26  
Old 01-29-2019, 07:43 PM
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Originally Posted by Franklin2 View Post
That makes sense, the duraspark II coil is round, the TFI takes the square coil. I like keeping the system original, I am a proponent of the round coil with the duraspark system.
I have a brand new Duraspark II coil I saved from my last truck so I should have all I need. Once I get the DS II system working I can yank out the computer harness, and toss the computer in the trash. I will be glad when I get it done, the cobbled up EEC-IV it has now making the truck run like total crap
 
  #27  
Old 01-30-2019, 06:56 AM
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You're almost there--hardest part is stabbing in the new distributor. Remember to connect vacuum advance to port on carb.
 
  #28  
Old 01-30-2019, 07:20 AM
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Wiring harness on my '84 F150, Top 2 plugs go into the DS II module?
 
  #29  
Old 01-30-2019, 08:47 AM
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Think so. Basically you are connecting the coil and distributor and temp/oil gauges. Disconnect the old coil, distributor and oil/temp gauges from the rest of the wiring first to get them out of the way and simply reconnect. It really is plug and play.
 
  #30  
Old 01-31-2019, 02:40 PM
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I went ahead and bought a brand new module, as the one a friend gave me had the black epoxy on the underside showing signs of running down the sides
 

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