alright so ive got a 1989 mazda 626 that will not start. it was running but i had a fuel pressure regulater that was leaking really bad. so i had to take apart the whole intake assembly to get to the fuel rail. i took off the whole fuel rail and removed the bad regulater and replaced it with one i got from a junk yard. I put everything back together the same way i took it off and now it wont start. I was told i might have just picked up a back reg. but i replaced it with two other ones and got the same result. The car sounds like it wants to start but just wont and sometimes it will even run for about one mins before it dies. I need help bad and need to get my car running again. thanks in advance!

 

any idea anyone? it sounds like its something electrical but i dont know what it is.