Emission Control Systems: Application and ID
Engine V6-204"/3.4L
Fuel System SFI
DEVICES & SYSTEMS
AIR Electronic Air Injection System
EGR Digital Exhaust Gas Recirculation Control System
CEC Computerized Engine Controls
EVAP [1] Evaporative Emission Control System
[1][2]PCV Positive Crankcase Ventilation System
TWC+OC Three-way + Oxidation Catalyst
FR Fuel Pipe Restrictor
SPK [2] DIS; EST; ESC
[1] EECS is the manufacturer's acronym
[2] Distributorless Ignition System; Electronic Spark Timing; Electronic Spark Control (knock sensor).