Emission System Application Chart

ENGINE DISPLACEMENT 4.2L (4172cc/255ci)

ENGINE MANAGEMENT SYSTEM MPI MFI with OBD II

ENGINE VIN CODE [1] G

EMISSION CONTROL DEVICES AND SYSTEMS:
CEC Computerized Engine Controls [2]
EVAP Evaporative Emission Control
FR Fill Pipe Restrictor
HO2S Dual Heated Oxygen Sensors, 2 [3]
O2S Dual Heated Oxygen Sensors, 2 (OBD II) [4]
MFI Multiport Fuel Injection
MIL Malfunction Indicator Lamp (CHECK ENGINE)
PCV Positive Crankcase Ventilation
SPK Spark Control
TWC Three-Way Catalytic Converters, 2

[1] 5th digit of Vehicle Identification Number (VIN). VIN plate mounted atop drivers side instrument panel, visible through windshield lower left corner.
[2] Motronic Engine Control, OBD II.
[3] Installed upstream of the catalytic converters and used for fuel mixture control and monitoring.
[4] Installed downstream of the catalytic converters and used to verify proper catalytic converter function.