i worked on my audi B6. 2003 with the 1.8T. I got the plugs changed and all went well. i drove home, 15 minutes later the engine started misfiring for a second every 10 minutes or so. when i got home i turned the car off. try to turn it on but the engine just keeps turning over and nothing. i try to start while someone is behind the car and just air is coming out and no fuel out of the exhaust pipe

What could the problem be?

fuel pump maybe?

Thanks for any help or suggestion

 

just checked and the engine isnt getting any spark. took the coils out and put in a plug and nothing with it grounded