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September 20th, 2017, 03:09 PM   #1
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2009 fe390 weak spark spark falling off

as the title shows, it will once in a great while just pop or idle for just a second then die, what has been done...

new computer, pickup coil, stator, rectifier/regulator, anti gravity battery, fuel pump is running, new main relay. wiring found lots of bad connections and wires all fixed and rerouted, went through harness again found nothing. all the related issues have been fixed and addressed. any thoughts im about at wits end with thing.
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September 20th, 2017, 05:30 PM   #2
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Try pouring A little fuel into the throttle body and try running it. If you can keep it running this way then it's fuel related. Check all fuel filters 4 of them , spray of injector also fuel pressure regulator
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September 20th, 2017, 06:47 PM   #3
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failed to mention swapped coil with no change from a running bike, also everything fuel delivery related is new including filters and all, spark plug is new, i'm not real familiar with this fuel injection system and wondering if any sensors would cause this. also no flashing errors from light. and timing chain redone before it slowly died.
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September 20th, 2017, 06:48 PM   #4
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still intermittent if primed with fuel
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September 21st, 2017, 02:53 PM   #5
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so after doing my due diligence and testing sensors for hours and troubleshooting i have found that i have continuity between ground and input of ignition coil....could this be the problem
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September 21st, 2017, 05:24 PM   #6
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no fault codes?
New stator or a rewind...?
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September 21st, 2017, 08:02 PM   #7
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wss not a rewind just new, my thoughts at first was oil coming in was grounding out stator....i could be wrong so i ordered new one from dealer, still confused about the continuity of input and ground on the ignition coil....... puzzled
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September 21st, 2017, 09:18 PM   #8
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What happened before the bike started to act up? If I understand right you cant start it now?
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September 22nd, 2017, 03:23 AM   #9
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should be a small number between the plus and minus poles on the coil usually .5 ohms
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September 22nd, 2017, 05:08 AM   #10
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Did u check the spark plug boot? They are known to gap where the boot pushes onto the wire, symptoms you describe

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