Nov 272015
 

1997 GMC 2500
Can you use a test light to check injectors I don’t have noid light

  One Response to “97 gmc2500 350”

  1. I have not ever had any success in using a test light for checking or testing fuel injectors. Nor have I ever heard of anyone else doing any good that way. I use a Probe style fuel injector tester. Works on all fuel injectors. It works by picking up the vibration when the injector actually fires. And you don’t have to unplug anything. Just touch the tip to the top or side of the injector and crank the engine over. The handle flashes as the injector fires. This tool is a must have for anyone diagnosing car fuel injection systems if they don’t already have one.
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