So my car has this little issue.

At random times, (not to frequently, its happened probably 5 times since I've owned the car) I've tried to start the car, cranks over at normal timing (second or two). Then the car struggles to hold revs. Then the motor stalls. So I try and start the car again, and then it just keeps on cranking and cranking and it doesn't catch. Takes probably 10-15 seconds with slight persuasion using the throttle.

Any ideas?

I'm thinking maybe the coil packs? As every once in a while I develop a flat spot in the rev range. About 4ish. And I've heard its a common issue with the grunters/rs's that the packs get crappy.