If your impact wrench is not working like it used to, there are a few things you may check before you throw it in the dumpster. If you are experiencing low power on your air impact wrench, here are three easy steps.The first problem could be a dirty inlet bushing or air strainer screen. Just simply clean both of these with a suitable cleaning solution.Next, examine the cylinder. Replace it if it is worn or broken or if the bore is scored or wavy.Finally, disassemble the tool and clean all part.