Engine System ID

ENGINE VIN CODE ID Z (8th digit)
5 Heavy Duty (8th digit)

Engine 5.9L (360 cid) 8-cyl.
Engine Configuration V8-OHV.
Computer System Jeep/Truck Engine Controller (JTEC).
Fuel Control System Multi-Point Fuel Injection (MPI).
Ignition System JTEC Controlled Electronic Ignition.