Noid Light Test Kit Fuel Injector Tester Tool Noid Light Set Fuel Light Fuel Injector Tester Kit 10-Piece

The fuel tester noid lights work with American domestic and European/Japanese imported vehicles with fuel injector systems; Includes 8 noids with different terminal pin configurations to match a wide variety of plugs (flat vs. rounded posts, wide vs. close apart, thin vs. thick); 3 noids compatible for GM, 1 compatible for Ford, 2 labeled Bosch, 1 GEO, and 1 MULTITEC-2. Disconnect fuel injectors, insert noid light, and watch the end of the extension when you turn over the engine (a flashing light indicates normal pulsing voltage); If the light flashes when the engine is on, the "engine control module" or "program control module" (not car computer) is giving the injector the current to open and close and therefore the injectors are receiving the signal to open and close solenoids to inject fuel; If not, injector may be gummed up and need cleaning.