There's a few things that could be happening here.
Step 1: Check that you wired the battery cables, grounds etc correctly
If that's all good... then let's hit Step 2: did you soak the plugs? Pull a couple of the front ones. If it hasn't started, they should be wet. If you have fuel and no spark, they should be wet. PS.. got fuel right? Cause some guy once had me swap an engine, I fired it up.. and it wanted to die. Guess what.. bingo..there was that little gas in the tank. This situation really pisses a guy off.
Step 3: check the connection at the ICM if that baby is loose, you ain't going no damn place.
Step 4: Got oil? Make sure you have oil and the oil level light isn't on.
Step 5: Unplug the maf sensor and give it a try.
Those are the few things that'll keep you from starting up. Normally.. I don't get past step 1 before a car will fire up.
