wont start after mew head install.... help

[Catoboli]

ok so i just put a first gen head on my 2g eclipse put the 1g cas in and inverted my injector pins and spark plug cables. now my car wont start. as i crank it it wont turn over then after a while of cranking say 20 seconds or so i just get this loud bang. kinda like a backfire which im assuming it is, any help would be great...

 

[jdballin]

sounds like ur wires are crossed. i would check the spark plug wires

 

[1fast97gsx]

your firing order is wrong .. invert it from what it is now. Trust me.