oh, is the pump priming,,, if you hear that then its gonna be ignition,, take 1 plug lead out at a time and rest on slam panel and get someone to turn over and see if you can see a spark,,, DO NOT FOR THE LOVE OF GOD TOUCH THE SLAM PANEL OR ANYTHING METAL WHEN DOING THIS !!!

if you got spark on the plugs that means the CPS is working,,,,, then wiggle other sensors about but thats where i would start tbh

1: fuel pump priming means your fuel is getting to the rail
2: spark from plugs means there is ignition so it could be weak ignition but that would start when convinced enough