hey guy wats up i have 92 accord lxwit 2.2.. i took it to emission and it passed the hc, and the NOX, but the CO% keeps failin, i put new plugs, and an oxygen sensor, but it stil failed and im runnin out of ideas of wat could it be, i know it could be injectors, but how do i test injectors, or if anybody else had the same problem then please let me know what you did? thanks in advance