Have an 07 700 Efi Atv that will not stay running. It may run for 30 seconds , a minute or 10 min then dies just like the key is shut off and it will not start after unless you give it about 1/4 throttle the it will fire up but won’t idle unless you hold it 1/4 throttle. It will eventually start idling. Odd time it will say efi on dash that with the copper head controller in Go in and retrieve codes and nothing, it will never say efi with the factor ECU . Throttle position is in mid on dash. New spark plug. It has a M109R injector. Has any have any ideas.