Hows it going guys, So after about a month of my blazer being out of comission i finally got it back with its new engine..everything worked great for about a week...truck has double the power it had before, but when i went on the highway the other night i noticed my rpms were at about 2300-2400 at 65mph...the truck drives perfect arpund town with no shifting issues at all, it just seems like its having trouble locking up on the highway, and it doesnt do it everytime just recently....also it was showing a P0446 code which is evap related...Any ideas or solutions or ways to check if the converter is greatly appreciated

Thanks,
Steve

no one?