How to Test a GM 4-Pin HEI Ignition Module (Bench & In-Car)
9:04
YouTubeMy Mobile Mechanic 978
How to Test a GM 4-Pin HEI Ignition Module (Bench & In-Car)
Having a no spark issue on your GM engine? In this video, I show you exactly how to test a 4-pin HEI ignition module — both on the bench and while it’s still installed in the car. Whether you’re diagnosing a no-start, intermittent spark, or just want to know if your ignition module is doing its job, this step-by-step video walks you ...
61K viewsMay 18, 2025
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Testing GM 4pin HEI Ignition Module - Step-by-Step Guide
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Testing GM 4pin HEI Ignition Module - Step-by-Step Guide
mymobilemechanic978
⬆️Click Here ⬆️ How To Test HEI Module
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⬆️Click Here ⬆️ How To Test HEI Module
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