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efii IGNITION system

Todd Red

I'm New Here
I recently purchased a RV-7A with a dual ECU efii IGNITION system and am experiencing a momentary engine power loss at lower power settings that coincides with a rich air/FUEL ratio. Any suggestions on diagnosing the problem?
 
Is the engine temp sensor working, that will richen up mixture when it sees cold, is there a leak in the line to the map sensor, a leak will richen mixture, is there any air restriction going into engine? when you say power loss, is the engine shutting down?
 
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