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I'm running a brand new HEI on my 402 and noticed today that I have an intermittant miss (at idle, and cruise rpm)on a couple of cylinders. I used a timing light on each wire and found that a couple of them will not fire every once and awhile. Plug wires are new, HEI is new, and I ran a 12V source from the fuse box. I'm at a loss at where to even start solving this. Can anybody point me in the right direction?
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