So about a week ago my 1990 Mitsubishi Eclipse check engine light turned on so I went home and told my dad about it. He turns on the car and the check engine light is gone and he says it turns off and on once in a while, does not really mean anything. A day after that it comes back but for 2 days straight and the third day I try turning the car on in the morning and it turns on but immediately turns off no more than 2 or 3 seconds later. Try it 2 more times and same results. My dad tries it and same results. He tries again a few hours later when I am at school and it drives fine. Whats wrong with it?