...

..Well Found the problem ..or should that be
problems...With the aid of some 'Snoop' i found that the steel festo type fitting INTO the Jetronics wsn't tight ..and the the Robart air line i had used to feed into that fitting was'nt sealing properley...The Robart tube is just to floppy to push home effectiveley...
Thanks for all the input guys [sm=thumbs_up.gif]
Brg
Dave.