Distributor

I removed the distributor for repairs turned the crank pulley to top dead center rotor was on number six plug lead fixed distributor replaced it with marks still on same places then to make sure no problem crept in I turned engine over till crank pulley was on top dead center checked the position of rotor and it came to number one checked if I have spark on number one and it gave me spark as well as clicking on the fuel pump. Now I wanted to start the engine because I felt comfortable I installed the distributor correctly first it started lazily and backfired, so I loosened the lock nut of the distributor and moved the distributor firstly left and then right but could not get backfire out so I changed plug leads 180 degrees, but now it does not start at all. I then took off all plug leads from plugs installed another set of plugs to the leads and shorted them on head turned engine and all six fired in sequence. I then took off the fuel rail and started engine and all six injectors are spraying, but putting everything back engine will still not start where did I go wrong?