SBEC-II Controlled Ignition System: Notes

The Cherokee, Comanche, and Wrangler 2.5L or 4.0L engines use a Single Board Engine Controller-II (SBEC-II) based ignition system. Base ignition timing is NOT adjustable with this system. The SBEC-II controlled ignition system consists of coolant temperature sensor, crankshaft position sensor, distributor (includes rotor and synchronization sensor), ignition coil, manifold absolute pressure sensor, Single Board Engine Controller-II, and throttle position sensor.