GUIDANCE NEEDED
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4wd Low
Joined: Apr 2026
Posts: 10
Likes: 0
From: clatskanie oregon
GUIDANCE NEEDED
bought an ugly. previous owner had done a bunch of engine work and he had lowered it. i put it back to stock and after a couple of very short test runs interspersed with a fuel issue am now struggling with a no start situation. when i pulled the distributor cap i found a roll pin just laying in the well of the shaft under the rotor. i have quite a bit of past experience but in this particular situation my knowledge is pretty basic and i am unsure how to proceed. truck is a 1976 f250 300cid 2wd t18 and as bare bones as it gets.
Lead Driver
Joined: Nov 2000
Posts: 6,635
Likes: 349
From: Albuquerque
Don't know about your dizzy but the only roll pin I would expect is holding on the drive gear. If that one shears you would lose ignition and cam timing. Sometime they will shear, stick and then move again.
Hotshot
Joined: Feb 2004
Posts: 10,833
Likes: 2,611
From: The Shenandoah Valley
Under the rotor is maybe a bumpy like wheel that causes points to jump if it has points, or is a wheel that passes a magnetic pick up coil, I'm not sure which in a '76 300-I6. Anyway, that wheel often uses a roll pin vertically between it and the shaft. Only place I can think of there uses a roll pin.
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4wd Low
Joined: Apr 2026
Posts: 10
Likes: 0
From: clatskanie oregon
awesome no points but yes the bumpy gear thing was something i suspected but i have no idea how far i can disassemble before i get in trouble and end up just going to get a new one. (this one is new) i have found breakdowns and step by step for everything except mine. Is info for 8 cyl close enough for horseshoes or are internals going to be in different positions etc..
Logistics Pro
Joined: Jun 2004
Posts: 4,789
Likes: 3,398
From: South Central Utah
1976 was the first year that electronic ignition came standard.
There is a roll pin that keeps the reluctor in place.
If that roll pin somehow came out of broke it could cause the engine not to run.
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4wd Low
Joined: Apr 2026
Posts: 10
Likes: 0
From: clatskanie oregon
new question regarding caps it appears that PO changed over to male cap and plugs from female is there any reason why this could be contributing to my no start problem. i keep finding conflicting information about whether or not rotor and/or pickup assembly may not be compatible.
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Logistics Pro
Joined: Jun 2004
Posts: 4,789
Likes: 3,398
From: South Central Utah
If it still has the factory distributo it should take this distributor cam along with a blue rotor.
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Hotshot
Joined: Jul 2020
Posts: 10,529
Likes: 2,658
From: Near Salt Lake City
Duraspark 2 came out in 76 in cars IIRR with the bigger 5 inch cap
Ford switched to the bigger diameter caps with an adapter to eliminate spark crossover
The high tension wires pull apart less using cap studs and make a better connection
Ford switched to the bigger diameter caps with an adapter to eliminate spark crossover
The high tension wires pull apart less using cap studs and make a better connection
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