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FE Technical Forum / Re: fire jumping plug wires
« on: November 24, 2025, 09:44:13 AM »
I had that happen on a 390 when I had one of those aftermarket clear dist caps. (remember those?)
I changed the cap to a good quality stock type cap and the issue went away.
You already changed the cap and more so IDK....
I also has a 65 Mustang 289 that would miss on hard acceleration.
Turned out to be a cracked radiator top tank.
Normal driving was ok, but when I hit it, the cooling system pressure would go up,
and the crack was on the engine side of the rad top tank, right in line with the dist.
It would spray a very fine mist of coolant right at the dist cap.
When I would slow down and stop and lift the hood, the heat had evaporated the water/coolant and the cap and rad was dry.
Took me a long time to find the problem, until one day I revved the engine hard with the hood open.
Then I saw the spray from the cracked rad tank.
I changed the cap to a good quality stock type cap and the issue went away.
You already changed the cap and more so IDK....
I also has a 65 Mustang 289 that would miss on hard acceleration.
Turned out to be a cracked radiator top tank.
Normal driving was ok, but when I hit it, the cooling system pressure would go up,
and the crack was on the engine side of the rad top tank, right in line with the dist.
It would spray a very fine mist of coolant right at the dist cap.
When I would slow down and stop and lift the hood, the heat had evaporated the water/coolant and the cap and rad was dry.
Took me a long time to find the problem, until one day I revved the engine hard with the hood open.
Then I saw the spray from the cracked rad tank.
