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Old 02-01-2013, 09:42 PM
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455olds 455olds is offline
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What about the pickup coil? They can get brittle and arc out as the vacuum advance moves the plate the ignition module sits on. I had one fail once the engine got warmed up. Easy to test, disconnect it from the module and check across the leads with ohmmeter (should be 500-1500 ohms, I think wires are green and white). Check from each leg to ground it should read infinite, be sure to move the plate as you do these tests to see if they short when moved. I also helped my cousin with a similar issue, he was missing a ground strap from the HEI coil to the wiring plug on the cap. It ran great then all of a sudden did not even though the ground was missing for quite some time.
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