multiple fault codes

[g113wrx]

Hi guys, not having much luck at the moment, i tried all of the above and nothing, i was told to change the cam sensor allthought it dont come up on a diagnostic or paperclip test? however i got a second hand seimans one from someone who said it was working but when i plugged it in and tried to start the car it didnt want to know... it seemed asif the fuel pump/pump relay wasnt working but when i put the old one back in it struggles but starts then revs to 4500 with alot of missing, is there more than one type of cam sensor for the ecotec? (sorry for writing a book)

[g113wrx]

thanks for the help guys but iv now stripped the ecotec and have myself an se9