XSI Wont start after being rebuilt????

[Niall]

No. The crank turns once for every two turns of the cams. Best bet to check timing, lock cams, lock crank. All ok? good, turn the crank pulley four times and then recheck timing. This ensures everything has done at least one rotation.
Got all your earths bolted down? especially the one on the gearbox as this is where the CPS earths to IIRC

Edit: and if it gets to the point, ive done a guide in the guide section for testing sensors including how to test a CPS to make sure its working. Just need a multimeter.