Ignition/Tuner/ECM/Fuel InjectionNeed advice on ignition issues? Questions about a tuner? Have questions about a EFI calibration or Fuel Injection? Tips on Engine Diagnostics, how to get codes, and what they mean. Find your answers here.
Please help me. I have a 2006 HD Heritage Softail. I need to replace the OEM coil, part no. 31743-01, but I don't know if I need to get a single fire or double fire. Anyone know?