Suzuki Club UK

Hi all, please can someone help me , I've got a 1999 vitara 1.6 8v . It will not start , it turns over fine but won't fire up. I have checked for spark from each plug, all okay. Took the return fuel pipe off and turned the ignition on and it chucked loads of fuel out. Even tried easy start and it tried to fire up. If I leave it over night and then try it for the first couple of seconds it will try and fire up but after that it just cranks over .
Please help