need help ASAP, car starts and dies Options

[ferngt4]

So i posted something about this a while back and i got some ideas leading to the igniter but thte part is sooo expensive and with rent coming up i dont see me doing anything. I took my car to school and for 2 phases we tried to figure out what the problem was, we hooked the car up to all the scanners and scopes available, when the car was running the spark line and kv was normal and it just stalled out of nowere. We checked for fuel, (going back to the for basics-spark fuel and compression) when we went to go chek for the spark after everything the teacher just pulled the spark plug wire out to see if the spark jumped and shure enough we had spark, so we left it running like that to see if we lost spark before the engine died again and we left it there for about an 1hr and it ran just fine. i ran the car for 2 more phases and here we are with the same problem again. ANy body have any ideas what it might be? thanks..