Wotto - Is the coil in test mode "Solenoid 09" ?

If so, it should be a AE-027-1200, and from the FTs Ive done, that should fire out no problems.

Couple of things to check ;

1 - Check the wires on the coil - are they loose ?
2 - Does the plunger move freely in the coil sleeve ?

I've seen these lubricated in the past, and in time they become sticky, also, if there is resistance with the plunger, it could be that the coil bracket itself is out of alignment. Prove this by loosening the 4 screws on the coil bracket - if it moves better, then the bracket has been bent, and needs to be straightened..

Hope that helps !