test the #1 injector with a multimeter. Easy test, but not always accurate, is to listen to each injector individually with either a mechanics stethescope or a screwdriver(ear to handle, tip to injector). Listen to see if the #1 fuel injector sounds different than the others. I believe the write-up on testing fuel injectors is in our how-to thread in the technical forum.allennei wrote:mmhhhhhhhh.....I was afarid of that at 70 bucks a pop