gazzas scooby

can any 1 help i have recently rebuilt my v3 sti engine now the car wont run after doing 50 miles the maf had no plug on but the car never used to run right when wormed up the revs would increase and drop sometimes cut out which i put down to the maf the maf i had on the car was a five pin green label but i only have three maf wires does any body know what is the correct maf and what order the wires go into the maf please please help