type138

anyone have the values of these...... trying to diagnose a problem on my 00 impreza 2.5rs.... i have ruled out the front o2 sensor....i just want to test the injectors to make sure they are working properly... the problem is a rough idle and hesistation up to 4k rpms. by the color of the o2 sensor i would say its running lean. the cel code is a po170 fuel trim malfunction. it is my understanding that i could have a bad map sensor too.