OK so I just got done putting my 4 barrel conversion all onto my car piece by piece, nothing crazy just a Holley 390 cfm carb on a arizona-z-car intake manifold. I used a self regulating K&N fuel pump to the carb. all the wiring is done and everything is in order but my car still wont start. If I spray carb cleaner into my carb my car will fire right up then die out shortly after (2-3 seconds). What could it be? I am getting fuel for sure at least all the way up to the carb that is. The carb was a used one off someone else`s RUNNING 280z but he did say it sat for awhile before I had bought it. With the way it acts if I spray carb cleaner in it I would think its a fuel problem but being relatively new to carbs I don't want to mess it up trying to tune something I know nothing about. If anyone could help me out that would be great because im 9 months into this project and its finally time to drive it and I cant wait! I appreciate any help at all, Thanks! -Gabe