Faulty ignition coil... again!

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Dart/Valiant

Dart/Valiant

Active Member
Joined
Aug 31, 2016
Messages
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Location
QC, Canada
On my Dart 1975 I had to change the ignition coil in August 2015. Now two years and not even 3000 miles later, again, the damn coil was faulty. This time I bought the most expensive available at Rockauto hoping it will be more durable. But I wonder what you think of that, if I changed two, it's just bad luck or if I should check out other components which explain this. Thank you for your help and advice.
 
Dart/Valiant said:
On my Dart 1975 I had to change the ignition coil in August 2015. Now two years and not even 3000 miles later, again, the damn coil was faulty. This time I bought the most expensive available at Rockauto hoping it will be more durable. But I wonder what you think of that, if I changed two, it's just bad luck or if I should check out other components which explain this. Thank you for your help and advice.
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With zero details, it's impossible to tell. Stock electronic ignition? Are you running the correct ballast resistor?
 
Dart/Valiant said:
Yes stock electronic ignition and correct four prongs ballast resistor.
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Make sure the ignition box is grounded GOOD. Often times, rust and crappola will cause the ground to be disrupted. The body of the box should have a clean, metal to metal ground wherever it is mounted. Some people even run an extra wire from a mounting screw to the inner fender or firewall, though not necessary as long as the box itself is grounded good.
 
RustyRatRod said:
Make sure the ignition box is grounded GOOD. Often times, rust and crappola will cause the ground to be disrupted. The body of the box should have a clean, metal to metal ground wherever it is mounted. Some people even run an extra wire from a mounting screw to the inner fender or firewall, though not necessary as long as the box itself is grounded good.
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Already done. I saw this advice here on the forum last week. So took my drill and a wire brush, cleaned both the ECU box and the inner fender, added a star washer between.
 
If you are using a oil filled coil in the horizontal position install it vertical. You may have a bubble in the oil causing a hot spot in the coil winding.
 
when I moved to Louisianan the roads where a litle rougher than when I lived in New Hampshire, coil went out about one month after the move. seems like an internal wire broke. went with a Mopar off-road coil and no issues. Since moving to Arkansas, switched to a FABO ECU and coil, no issues with that set up but roads are smoother also.
 
mderoy340 said:
If you are using a oil filled coil in the horizontal position install it vertical. You may have a bubble in the oil causing a hot spot in the coil winding.
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The coil was always in vertical position. It's the original bracket, original location.
 
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