[JL8Jeff]

Well, I was doing some more troubleshooting and I noticed that the SES light seems to be coming on when the EVAP purge is running. I checked up at the intake by sucking on the purge line and there was almost no resistance and a bunch of tasty bits of charcoal material! A couple of the short purge line rubber hoses were dry rotted and loose so I replaced them. The canister itself must be shot because you can shake it and hear the charcoal bits moving around. I put in my slightly used canister and hooked all the lines back up and tested again at the intake and there's much more resistance so that's a good sign. I think the bad purge line/canister situation was allowing too much unmetered air into the engine causing the lean condition which resulted in the P0300 code. I'll take the car to work tomorrow to see if the code comes back. I'm hoping that's the only issue but I'm worried the purge solenoid at the intake is contaminated from the charcoal bits so I'll probably be replacing that as well.