I'VE HEARD OF REPLACEMENT INJECTORS (THAT WORK) FOR THE EVER-FAILING GM MULTECH INJECTORS, NAMELY, NIPENDENSO/DENSO INJECTORS. OUR SHOP CAME ACROSS AN, "ASNU" FUEL INJECTOR ULTRASONIC CLEANER FOR RELATIVELY CHEAP AND WOULD LIKE TO BEGIN TAKING ADVANTAGE OF THI... Login to read more.