The ignition distributor followed from the breaker point and conventional electronic ignition era into the electronic fuel-and-spark management EFI era. The EFI/MPI distributor for a 4.0L Jeep inline six-cylinder was in production through 1999. EFI engines have computer controlled spark timing and a crankshaft/camshaft position sensor. Latest coil-on-plug technology eliminates the need for a distributor. EFI/MPI distributors require periodic service of the rotor, cap, and cables. Earlier carbureted engines also add breaker point service to their tune-up requirements.