what could be the source of an evap small and medium leak. my check engine light came on so i got the codes and three came back, misfire in cylinder #1, small and medium evap leak. i need to go to emmisions in 5 days and i dont know where to start with the evap problem

 

cheapest fix is a new gas cap.
i had a medium evap leak and this fixed it.
don't forget to reset ur computer.

u should also look over the whole evap system for any cracks in hoses.

 

I just checked all my hoses today since my light has been on for over a year finally got around to doing it dont know if it fixed it though had to leave in a hurry and didnt get around to resetting my computer. Next thing is gas cap

 

If not the cap look at the fill tube, top part (screws to the box side) is prone to rot out, that's what mine was.$220 dealer only part, 5min DIY fix.