Just finnished a look over my escorts.. seems that the 99 has 2 lines also. one from filter to engine and other hooked up somware on engine and goes to evap port then a line back to tank from evap port. The 97 has 2 lines also but does not seem to go to an evap port that i can see. It seems to hook up to the intake on passenger side( think this is the line in) then on drivers side intake and return to tank. I was told a 97 escort was a match for a 99 escort (plug and play) but seems not. HELP! | 
