I have a s5 turbo, with recently rebuilt engine. I parked it after it just clocked over the 1000km mark. Now, it wont start via the starter motor again..

It sometimes sounds like its about to start but just cant quite get there. However, it does roll start... and seems to have really crappy power.

When trying to start normally it does 2 good rev rev sounds, then the 3rd is like it gets stuck/dies.. however, when pulling the fuse for fuel and then turning it over, it makes 3 perfect puff puff puff sounds.
Theres also a slight smell of fuel about.

Help?

 

Check compression...