1998 with 3.8 and manual trans. I have replaced fuel cap, fuel tank pressure sensor, and EVAP solenoid near right hand rocker cover. Still getting P1665 primary code and P1665 P secondary code. Car seems to run fine but starts harder than normal sometimes. Any suggestions?

 

if you haven't downloaded the factory service manual, get er done. can have a look at this https://camaroforums.com/forum/lt1-l...-system-51219/ its from a 93 book so yours may be a little different, same principal

 

go here to download manual for your year. https://www.mediafire.com/?40mfgeoe4ctti