She broke the car already and I've only been gone for a day...

Anyhow, when we bought the car we were told that there was a procedure that had to be performed before the car would fire, due to the Walbro or fuel line being installed funnily or something.

The procedure was, prime the fuel pump twice, press the throttle twice, and then fire it up. This worked grand for the last few days, but this morning for some reason the car refused to fire when Kelly was heading to work but she managed to bump start it on a hill. The problem has reared it's head again this evening, and she is now stuck in town with the car.

Anybody got any clue as to why the car has to be started that way, and what can we do to sort it? Would it being low on petrol cause the firing problem today? When I say low, it's just under a quarter of a tank.