Join Date: Mar 2002
Location: Austin, TX, USA
Generally yes, the coil is either good or bad. But anything is possible. Especially if the coil has been overheated at any time it may develop and internal bad connection.
More likely is that the ignition module is intermittant. Another possibility is that the pickup signal is week. Pickups are even less likely than a coil to go bad. But the magnets can become weak over time and not supply an adequate trigger pulse for the module.
What kind of problem are you experiencing exactly? Is it a misfire problem. There are other potential causes.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI