Still Will Not Start!!!

[jkmc17]

I have an 82' 911 with a 3.0L engine. I went to start the engine the other day and it took longer than usual to for the engine to start. I drove it home and the next day, the engine would not start. The engine will turn over fast, but will not fire off. Things I have checked:

Fully charged battery
Spark plugs are firing
Fuel pump is working
Fuel filter is not clogged

I am getting fuel from the out side of the fuel filter, but no fuel from the line to the injector. Any suggestions?

[G450X]

Check your air box and see if you have a pop-off valve that blew off or is not sealing properly, or if the CIS flow plate is stuck.

My pop-off valve had blow itself off and was sitting in the corner of the air box!

[jkmc17]

The pop-off valve is good. How do I check if the CIS flow plate is stuck?

[psalt]

If you remove the filter, you need to bleed the air out of the system. Remove the air filter, lift up the air flow sensor with the key ON, listen for the fuel at the injectors. Only do this for a few seconds or you will flood the engine with fuel.