i need help connecting the vacuum hoses back I know they are correct but when I disconnect the egr vacuum hose I don't feel any vacuum at all? im new to datsuns and I really like my 620 everything else is right on except it didn't pass the egr validation I took the egr off and cleaned it, it works fine but im just not getting the vacuum I really don't know what is wrong. I need help with the vacuum diagrams I cant find any that look like the motor I have and I have a 78 dat 620 and it has everything stock