Car was running good then it stop on a rainy day (at this time i dont have a scanner). Crank but nothing, changed knock sensor and crank sensor, still nothing problem was ECM put a used one now car run but rough check the plugs they are all black full of carbon. I purchase a scanner thru ebay (v1.3.6 rs232) but cant get a reading on the PC, i plug it on the car an 2 light comes on.....any help out there??? thanks