Engine Identification
ENGINE VIN CODE [1]: GENGINE DESIGNATION CODE [2]: ABZ
ENGINE CONFIGURATION [3]: V-8
DISPLACEMENT: 4.2L (4172cc/255ci)
COMPUTER SYSTEM [4]: MPI Bosch Motronic 5.4.2
FUEL SYSTEM [5]: Sequential Multi-Point Fuel Injection
IGNITION SYSTEM [6]: Mapped Electronic Ignition
[1] 5th digit of Vehicle Identification Number (VIN). VIN plate mounted atop driver's side instrument panel, visible through windshield lower left corner.
[2] Engine code and serial numbers are stamped on the left side of the cylinder block (arrow) directly above the power steering pump.
[3] DOHC 32-valve (4 valves per cyl.), 300 HP @ 6000 RPM.
[4] MPI Bosch Motronic with OBD II. System uses single control module for both fuel and ignition control. Motronic is fully adaptive.
[5] Fuel System uses 4-hole single-spray solenoid-type injectors, dual oxygen sensor feedback, start and idle speed control, after start and acceleration enrichment, deceleration fuel shut-off.
[6] Transistorized Distributorless Ignition System, Coils controlled by Power Stages, Hall sender and cylinder selective Knock Control.