2000 yreg nisan micra wont start?

my 1.4 nisan micra wont start, engine turns over, fuel is coming out of filter hose when cranking engine over, have replaced crank and cam sensors
and have a spark at the plugs, have been told it could be the ignition barrel but need to know how I can confirm this whithout buying a new one, also imobiliser light seems to be working ok [flashes when ign off and goes out when ing turned on].