Hi I Don't know about the starting problem, someone else will hopefully be able to help.As for the rear washer jet not working I'd be very carefull about using it if you don't know where the waters going.I had the same problem last year and found one of the joints in the washer pipe had popped open wetting the passager carpet.There's some electrical gubbins under the seat that you don't want to get wet.The washer pipe runs under the passager side carpet(lift up the door trim and you'll see a joint),then another joint is above the nearside rear post(check again in boot for wet carpet) then theres a joint where the pipe attaches to the rear washer motor in the boot lid.These joints are crap plastic things and i've had 2 pop open now.They do snap shut again but if you've checked the nozzles are'nt blocked and these's plenty of water in the reservoir maybe worth a look.