Messed up by getting diesel fuel in the gas tank

I have already pulled the tank cleaned it out put in a new fuel pump. While it was out I blew the fuel lines out with air, cleaned the fuel rail and blew air through the injecter screens. Still it will not start, when crancking on the moter it trys to start and run rough for just a seconds then dies. If I let it sit for a few min it will run a few seconds which is still not but like 10 or 15 seconds. I noticed today that while trying to start the motar the injecters spray about 1good spray.

I took the supply line off the fuel rail and the fuel is steadly come\ing out but not at no spray with lot of presser but like a water hosr opened up a quater of the way I checked the pressaure at the fuel pump and it is about 49 to 50 psi I put a noid light on the injecters and it comes on bright then the next flash is dim then dimer.I am open to any answer please