(uk) accent 1.3LSi starting problems

Hi all, im new to this site so i hope you can help and hope i will be of some helpin the future..

About 3 weeks ago my hyundia started cutting out when it got warm, but if i left it a few minutes to cool it would start up and off we would go for half hour or so.. the mechanic told me it could be one or two things either the co2 sensor or crankshaft sensor... so we replaced the co2 sensor and was still the same so replaced crank sensor.. now it won't start at all.. the car turns over really well, but just wont fire...
we took it to hyundai main dealership for diagnostics and it came back with fault on idle speed acctuator... but mechanic said that would not stop the car from firing, it would just run abit rough.. so adviced me to check that we had a spark and check fuel pump and fuel pump relay... which we have done and all work fine..we even checked all fuses and relays, all work fine... He then told us to remove fuel pipe upto fuel rail,crank car, to make sure fuel is getting there, which it is...

is there something to check to turn the injectors on??
OR is there something else i should try, im in your hands guys/galls..:grinyes:

many thanks in advance..
willie:banghead:

hyundai accent 1.3LSi
1996 x3 model uk spec
1341cc 12 valve ECFI
G4EH engine number
petrol engine
5 speed manual gearbox
5 door hatchback

Unscrew injectors, keep them connected. Then crank your engine to see if gasoline sprays, when engine is hot. Do test after engine shut down. Warning, fuel it's dangerous.