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Discussion Starter #1 (Edited)
I had trouble with my atv. Turned out that i needed to replace my fuel injector. It ran for two days. Then suddenly it sounded like it didnt get any fuel when i was driving around. When i almost stood still and held the throttle all the way in, it suddenly got fuel again. It now also has a very weak spark and most of the time it wont spark. It is hard to start and wont run at idle speed. Any ideas of what could have happened?

Edit: my ecu had bad ground. I connected an extra wire directly from ecu ground to my engine to make sure i have good ground.
 
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