Ek 2000

Okay so my y8 block blew on my 2000 ek so I swap it with a full z6 head and block I had laying around. Everything is bolted up and in place I bought a jumper for my dizzy and also for my ecu to run the p28 also I’m using the y8 intake and fuel rail. However when I got in to start the car it didn’t start (only cranks) I’ve been searching everywhere to see if anyone has Info on this swap but everything I’ve found I have done already to get it to work. I’m trying to see if anyone has any ideas on what the problem can be (any help is useful please)

Also would it be easier if I just use my y8 head on the z6 block to avoid any problems?