rjs scort, urs is looking NICE

what engine has it got?
soon as i wanted to go out in mine it wouldn't start

the sensor plate is really stiff gets even harder when fuel pump on i no its suppose to but its whey harder den it shud be. when its pushed down the car starts straight away but when u let go it dies, itslike theres not enough suction to pull air past it, it barely moves when cranking, checked all IC piping etc. neone got any ideas, cheers