so i was sitting in the drive thru at mickey d's yesterday and my check engine light came on..its done it before but when i shut the car off and turn it on again its gone...well i tried to scan it but i cant find a port its a 94 integra with a 2000 b18c-r swap with a 94 p28 ecu.. i wanted to get hondata anyway i was thinking the s300 unit so that way i know i can scan the codes...does anyone know if i can scan for codes using the s100 or s200 units? and what does everyone think about the s300 unit i was thinking it was expensive but is it worth it?