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About a week ago coming home from an event, traveling about 35mph, the engine quit running. Put the clutch in hoping it would restart but it did not so coasted into a parking lot. Engine would crank and fuel getting in the carb but no start. Getting dark and limited tools so had to flat bed it home.
Typical to begin diagnosis ie. Get the meter out. 12+ v to BATT, Spark plug light hooked up and nothing going to the plug when cranked. Rotor turned. Coil tested ok.
Decided next it must be the ignition module or the pick up coil. Wires and connections looked ok. Ordered a SMP module based on reviews , applied heat paste & installed. Still crank but no spark. Then started looking at the pick up coil next although probably a rare occurance. Continued to think about it and back to the module, so ordered another brand (Delphi) and installed it today and engine immediately started. It was a bad new module I installed earlier this week..
Of course returning for refund but just wasted all this time when a simple change should have solved the problem days ago.
I had similar problems with my 79 and auto parts store modules. I got a DUI 4 pin dyno mod . Davis unified ignition module about 3 yrs ago. No more no starts or misfires. 👍
I think we have all had issues with new replacement parts.
They don't work or fit right out of the box, or they fail way to soon.
I could tell story after story. But I won't bother.
It is very frustrating indeed.