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If you can start the engine when cold, but it sputters and stalls when it's warm, then you most likely have a bad ICM. When you crank the engine, if you have tachometer movement, then the module is good, if there's no tach movement while cranking then the module is bad. The tachometer gets the signal from the module, so if the tach works, then the module is good.

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15y ago

What else can I help you with?