Does any one know where the best spot to start looking for an evaporive system leak?

 

Check the fuel cap, the evaportive canisters (on the outside of the frame under the cab), also check the rubber elbows at the canisters, and the rubber lines under the hood. The canisters get damaged easily by road debris and the rubber lines and elbows rot and crack, the crack may be on the inside of the elbow and hard to see.

Will