poider

Hello, Iam not sure if this forum is approprite for my problem, allthough I do own two Toyotas, a yaris and an aurion, my son owns a mitsubishi colt, 81 model. He has had it for about 1 year, and has barely started it due to his lack of licence. I attempted to jump start it today with my aurion, the starter motor turns over sometimes fast sometimes slow but it will not start, i don't know what is wrong and i am not the most mechanical minded person, but it seems to me that the petrol is not getting through to the engine coud this be the problem and what do you suggest to help. please Thank you, poider