Engine trouble; wont start, has gas and spark Options

[creis]

Well I finaly figured out my cars electrical problems (would not do anything no spark at first then no crack at all, found a few lose connections in the main fuse box that were to blame as well as my alarm wiring that was causing it to disable the ignition, and a few bad relays ) anyway now I can get it to crack spark and spray fuel, but it still will not start, what it does do when trying to start it; cracks and every so often there is the sound of a serious pressue thump a few in a row and it sounds normal for a while again. its a cycle but not always the same amount of time when it does it. I don't know whats going on but all I can think of it being is a timing issue valves not working in sync with the rest of it so no air and a pressue build up at the wrong point although I cant belive that as I did not mess with the timing of the new engin at all.

Any thoughts, I'm so close to getting this mess done I can taste it.