390 ignition issue
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390 ignition issue
So recently I got back to working on my truck and it sat for only a couple months and went to fire it up but it didn't have a spark, so I replaced the cdi box, coil and magnetic pickup in the distributor. I'm getting spark from the coil but not through the distributor, someone please help me I'm tired of this crap!
Cargo Master
Joined: Jul 2015
Posts: 2,063
Likes: 137
From: tucson
I would pull the distributor cap and clean the inside and check the rotor for corrosion. I would also check my points and point gap. I once had a car that would start to run poorly and miss. I would wipe out the the cap and take emery paper to the rotor and it would run fine. (I was on a starving student budget).
john
john
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Joined: Apr 2004
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OP says he has a '76, and refers to magnetic pickup in the distributor. This would either be Duraspark or aftermarket electronic ignition.
That said, the advice to clean things up and inspect components holds, along with tracing the system back to a point where you find electricity. Where the juice starts is also where it ends, so find the component or connection that's not passing it on.
You must be methodical in doing these things. Don't just replace parts, find the culprit.
That said, the advice to clean things up and inspect components holds, along with tracing the system back to a point where you find electricity. Where the juice starts is also where it ends, so find the component or connection that's not passing it on.
You must be methodical in doing these things. Don't just replace parts, find the culprit.
Lead Driver
Joined: Aug 2003
Posts: 6,305
Likes: 18
From: Boulder Creek, Ca
OP says he has a '76, and refers to magnetic pickup in the distributor. This would either be Duraspark or aftermarket electronic ignition.
That said, the advice to clean things up and inspect components holds, along with tracing the system back to a point where you find electricity. Where the juice starts is also where it ends, so find the component or connection that's not passing it on.
You must be methodical in doing these things. Don't just replace parts, find the culprit.
That said, the advice to clean things up and inspect components holds, along with tracing the system back to a point where you find electricity. Where the juice starts is also where it ends, so find the component or connection that's not passing it on.
You must be methodical in doing these things. Don't just replace parts, find the culprit.
I found the link below the easiest to follow than any of the other DS diagnostic sheets I have come across.
https://www.ford-trucks.com/forums/1...on-module.html
Logistics Pro
Joined: Mar 2005
Posts: 3,771
Likes: 80
From: tujunga, calif
So recently I got back to working on my truck and it sat for only a couple months and went to fire it up but it didn't have a spark, so I replaced the cdi box, coil and magnetic pickup in the distributor. I'm getting spark from the coil but not through the distributor, someone please help me I'm tired of this crap!
Posting Guru
Joined: Jan 2005
Posts: 1,051
Likes: 0
From: Douglas, Georgia
Going from memory, you need between 600-900 for that pickup. Seems like that is the most common failure in a duraspark distributor.
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