So I've been doing a bunch of work on a new (to me) 2008 A4 Avant (automatic) over the last 4 days or so. I've replaced:

- valve cover gasket
- fuel injectors
- intake manifold gasket
- coolant flange
- coolant temperature sensor
- oil filter housing
- throttle body gasket
- replaced PCV with ECS catch can

Pretty sure I plugged everything back in, don't have any missing screws, but its not starting. It sounds like it's cranking, but it won't catch.

Anyone run into a similar issue? Any ideas?