my car has hesitancy starting up...whats the problem?

Need a make, model and year. It's just not the same for every car.

ok im from aus and are not familiar with those cars

wot car is it? could be fuel pressure if EFI car, or maybe the weather is different now, or the throttle cable has stretched a bit and the idle needs speeding up. dirty airfilter? bad choke? Poor compression-worn motor. bad fuel? Not likely to be electrical, much more likely what's listed.

I've had a problem similar... could be a pressure problem. Gas cap may need to be replaced or screwed down tighter... just a possibility

When did you last do service or maintenance or at least change the air filter.

It is not getting either enough air or fuel, check air and fuel filter and backtrack from there.

you better mention what car you have because some cars you have to pump the gas.