rough idle after fillup

[egreen04]

I have a 2001 Hyundai Elantra that for the past 6-8 months has been idling rough after each fillup for the 1st 3-5 miles. Idling smooths out after this initial period. Acceleration & running at higher RPMs is fine. I've changed plugs, wires & regularly change oil, filters, etc. Have also used gas treatments on occassion to no avail. Am wondering what might be the cause. Appreciate any thoughts/recommendations!

[Scrapper]

try not filling it up and see what it dose over fill can get in you pollution canaster. i belive theres a relay that's going bad these last few years also.

[egreen04]

Scrapper,

Appreciate your feedback! Didn't quite understand the recommendation regarding the "pollution canaster"...can you elaborate? And what relay specifically could be bad?

Thanks so much!

Ed

[kwk39018]

charcoal canister.