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Well, you did just about the best test there is. The old one worked, the new did not. The only other possibility, and it's very common with the Dyna coils, is that you may have shorted out the wiring to the frame. I've seen this a few times. Make sure the wires and terminals at the coil have at least 2 or 3 mm of clearance in every direction. With less clearance, vibration can make the coils move just enough to short out. This type of shorting won't harm the coil, but can melt wires or blow fuses.Hi, again loudhvx. The vehicle is finally finished. The only problem that came up was changing the original coils with green Dyna coils for the Dyna S. system. 1 and 4 were not firing. I put the 1 and 4 original back and they fired. Could the new Dyna be bad out of the box? Very frustrating. Not sure how to test the new Dyna coil to see if it is really bad before trying to send it back.
Are the old coils the stock 4-ohm coils? The fatter spark is a mystery then.Hope you can help again. So close too. I also switched them and still bad. I finally put the original coils back and everything was ok. Also the bad coil got hot even with the engine not running. I also noticed the old coils had a fat blue spark while the Dyna was just mild orange.
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