how to test an HEI ignition module?

Answer 1

I own a shop, and can tell you most all parts stores have a test machine for this. A word to the wise though; They will be bad sometimes and test good. The reason; they will work just fine until they get hot, and they just quit working. Example would be: You start the engine, go down the street, and bam it stops dead. Wait an hour, and she fires back up like nothing happened. Same thing when you test it; if it test good and your vehicle is doing as I suggested, replace the module because that is the problem.
Glad to help out, good Luck!!!

Answer 2

NAPA auto parts stores all have ignition module testers made by Innova that they will use to check your ignition module at no charge. That tester is dynamic as it tests for module circuits and drivers and for module failures under heat stress. Its the best way I know of to have the module tested.

simple replacement of the module is an alternative but if the problem is caused by a loose connection or a wiring problem to the module you won't find that out until the new module doesn't work. At that point the parts store will not take the module back for a refund as they will not warranty electrical parts in general and ignition modules in particular.

Beyond the module, the coil or cap could be your problem if you're not getting spark.

Try NAPA first and you'll be sure if its the module or not.

hope that helps