2000 Jetta mystery
 

1.8t with 120,000 miles will start and run for 10 minutes and then stalls and wont re-start till several hours or next day later.

Could Coil packs cause this? Or is it more likely a Fuel Pump?

Recently put new belts, battery, and plugs in it. But it did this before the new plugs as well as after.

Any help or suggestions greatly appreciated. Coil packs I can do myself, Fuel pump probably not.