Can be a number of things ;
Loose wire on the coil
Coil Sleeve
End of the mechanism that ejects the ball is "mushroomed"
End of the mechanism that ejects the ball is hitting something on the way up
Thanks Nino have checked the following:
1. all wires ok (on p2000 they slide on)
2. the end of ejector seems ok has the rubber three prong cap on it
3 doesn't look like its hitting anything but can't be sure
haven't checked the sleeve but the coil itself looks like brand new but will check the sleeve. Any other thoughts?
thanks again