Hi guys. been having some problems with my 97 GTP. So I have been going through the different vac lines and connections to see if there is a leak. I pulled the rubber hose off the evap vacuum switch(the one that goes to the purge canister) and it was plugged with some shiny black flakes and when I crushed them up they smelled chemically not like gas. Could these have come from the purge canister? Cleared out the hose the car still isnt running great. Any tips would be great. Thanks guys