well id rove all the way from my house to work this morning with the gaugge, its digital made by lumention, i am not looking for exact gauge, just something to look at lol. but its reading lean alittle. but the real question is, should the lights be moving alot and changein? becuase it just stays on the one led, is it not connected right to O2 sensor? i connected to the blue wire BEFORE the cat, with a butt wire tap, i didnt acutally cut the wire, u guys think i should just cut the wire and slpice togheter with out the butt wire tap to make sure i get a good connection? beucase this thing isnt moving at all?