the car will crank but wont start on 1999 Infiniti Q45

I was driving yesterday and the car shut off and i cant get it to start up. have already done tune up but still will not start. please help

by in Fairburn, GA on March 07, 2011
1 answer 1 comment
ANSWER by , March 07, 2011
There several reasons the engine would not start. It is imposible to tell what it is without diagnosing the problem first. Without more info, or a car to look at my guess is as good as anybodys. Theo
COMMENT by , March 08, 2011
I have already done tune up. the car starts but cuts off right away. could it be the idle air control valve?