⚡ TESTING GM 4-Pin HEI Ignition Module, both on the bench and in the car. If your engine’s cranking but won’t fire — this is the first thing you should check. ✅ Power ✅ Ground ✅ Coil Negative Switching If it ain’t switching — it ain’t sparking. #IgnitionTrouble #NoSpark #HEIModule #GMTech #CarWontStart #DiagnosticsDoneRight Part 11 | My Mobile Mechanic / Auto Repair & Brake Replacement.

126K views · 4.8K reactions | Aviation History Month celebrates the pioneers who blazed a trail more than 100 years ago, changing aerospace and our lives forever. A century of innovation followed, taking aviation to new heights, distances and speeds. ✈️ Watch to see where we’ve been and a peek into where we are headed.  | Lockheed Martin | Facebook

From bicycle makers to aviation pioneers. | The History Page