Digital EGR Valve - 1993-94 3.1L, 3.4L & 3.8L (VIN 1)

Start engine. Using Tech 1 scan tester or a tester capable of cycling ECM output devices, select miscellaneous tests. With engine idling, RPM should drop and engine should idle rough as each solenoid is energized. If system operates as specified, EGR valve is functioning correctly.