starting problem

[mightymaxtj]

engine turns over and starts fine but only runs for a few seconds then dies. fuel pump or filter? it is a '90 mitsubishi mighty max

[GreyGoose006]

could it be an anti-theft device preventing the car from running without the magnetic or whatever keys?

what else is it doing?

[fat-lad]

sounds like a fuel pump to me, can you hear the fuel pump (arm) whine when you turn the key before it starts??

[INF3RN0666]

What you said doesn't explain anything. What about sounds? How does it run (rough or smooth like usual)? I doubt a 90's car has a decent anti-theft system that shuts off the car anyways. You might want to make sure that your vacuum hoses aren't off or aren't torn. If it keeps running and turning off, I would doubt it's a fuel problem. A weak pump would probably give you a hard time starting the second time around.