Good question lol, i might need to make myself a list anyway
I have to get my fuel system secured, it is leaking in a few places
extend the O2 sensors, and have the bungs welded in the reducers
Need to adjust the fuel pressure to 50psi at the rail
Got to Get the car to the exhaust shop and have the mid pipes and x pipe welded in
Having a Charging issue, but I think my alternator somehow went bad, so I need to replace that.
And lastly my wiring could use some cleanup so I'll be redoing a lot of it for a much cleaner engine bay.
I'm sure i'll be finding a few more things to do here soon.
As far as the C3 question, no it won't run without the C3 connector. That's where the CCD bus's are, they are of the some main communications from pcm to engine, as well as the send for the auto shutdown relay.