More info now--

apparently the indy- has found when it goes into NO CRANK-- the tach is bouncing from 500-900 rpm NO CRANK/NO Motor running...

when it DOES start (Randomly) the Tach is at Zero- like it should be when in Glow plug lite position... in other words when he initiates GP Position and sees NO TACH move - he knows it will be a successful crank/start

when he turns to GP Position and sees Tach Movement-- he knows- it will be an NO/CRANK/NO START

hope that helps some guru's out there