im showing a code 90 on my 2000 gsr. i know what it is but i have no idea how to fix it. i had a b18 head on it, but now i have a b16 with a charger on it. i know thats not why it throw that code cuz, when i got my car back it was fine! it happend two days later.

 

code 90 says

Evap system leak detected in the fuel tank
or else in the canister area

hope that helps

 

what is a canister area? and how would i go about fixing it? how do i locate it? if you dont mind answering that! than!

 

ttt