Fuel Control Signal (3.8L)

In addition to the RPM reference (18X) signal and fuel sync (camshaft) signals generated by the ignition module on 3.8L models, a fuel control reference signal must also be passed on to the ECM in order to inform ECM that proper signals are being generated to the ignition module. The fuel control signal is generated by the C(3)I module from calculations involving signals from the 18X and the 3X pulse rings.