its not the main relay i checked can it be the o2 sensor not being plugged in or cause i am using an si ecu or the map sensor is bad?? would that make my car start and die in a few seconds and not let my car stay on??? any ideas?

 

Check for adequate fuel. Check for spark, make sure the engine is getting air... Do this and let us know

 

it has to be fuel!

 

it has spark it just starts fine and then dies boggs out and idle drops a few seconds after starting i have no frickin clue what is wrong

 

if you have a friend around spray carb cleaner in the throttle body while starting.when running keep spraying,if it keeps running then its fuel.thats the easy way i would do it.