There is charcoal like substances in the vapor canister line. Why would there be charcoal clogging up the line? I'm guessing I have to replace the charcoal canister? I've just replaced the fuel lines about 2 weeks ago but this problem was ongoing before I replaced them. I thought the lines were just clogged up, now with new lines, the evap line still clogs. Btw my car is a 94 Z28.

 

i would say your right, replace the evap canister and either clear the line or replace it. test the pressure control valve and purge solenoid. https://camaroforums.com/forum/lt1-l...-system-51219/

 

Ok. Is it necessary to release the fuel pressure? I'm doing this job within the next couple of days. Purge solenoid was clogged up pretty bad too.

 

no the fuel line is separate from the evap lines.

 

thanks craby