M40b16 cranks but doesn't start

[Jinglejangle]

New to this forum malarkey so forgive me if I sound like an idiot, was wondering if anybody out there could help me.

Bought a 1991 316i at the end of may, it had a lumpy idle issue that seemed to be a huge crack in the intake pipe so I replaced it hoping that would solve the issue, whilst replacing the pipe I thought It would be a good time to give it a little service fresh oil new spark plugs, the exhaust had a pretty sizeable crack in to so I went about replacing it left the car standing for about a month (holidays and festivals) I'v come back and now it won't start it cranks but no start :/ I'v checked all the spark plugs are sparking which they are. So I have no idea why it's not starting anymore with all the new bits :/ any help on this would be massively appreciated

[Brianmoooore]

Welcome to the zone!
Are the spark plug tips wet with fuel after a cranking session?

[Jinglejangle]

Finding this place extremely helpful cheers, I haven't looked should be able to get some free time today have a look will keep you updated

[arrisbmw]

COULD BE YOUR FUEL PUMP RELAY OR AND /FUSE, THINK THESE ARE COMMON PARTS THAT FAIL.
IF YOU GOT A SPARK I,M THINKING FUEL. BUT SAYING THAT ENSURE BATTERY IS FULLY CHARGED, SHOULD BE OVER 12.6V. AS YOUR CAR BEEN STANDING A WHILE.