swapped engines/ecus now it wont fire up

[canonize-ryda]

I am honestly thinking it fuel but is there anything to check up before it will start. I cranked for a little bit and then i noticed i was on empty. So i figure some high octane fuel should help her fire up. what do you guys think? I also was going to fire it with the old oil and then change it once it was running. That way i can get all the gunk out in a filter before changing oil.(sound like a good idea?) Then i was going to change filters once it was running so that the old filter could catch anything before i swap in a new one. Plug wires are new but haven't check the plugs at all. If it wont fire in the morning after some new fuel then ill look into the spark plugs. And go from there, what do you guys think?

 

[eclipsalon]

i had the same problem awile back, was the plugs for me.
http://www.dsmtuners.com/forums/articles-miscellaneous/217951-how-diagnose-no-start.html

 

[canonize-ryda]

Well i didnt connect one connection and that is the thermostat sender. I broke the blade to clip onto and now i need to get it to connect somehow. Will my car not start with this not connected?