2.1a. Location of emission control system components on a 3.1L engine: 1 - air filter housing, 2-throttle position sensor (TPS), 3-distributor, 4-warm air intake, 5-crankcase forced ventilation system (PCV) valve, 6-idle air flow valve (AIC) 7-air flow sensor (IDA), 8 - valve electronic vacuum regulator of the exhaust gas recirculation system (EGR), 9-plate VECI
2.1b. Location of the emission control system elements on a 3.8 l engine: 1 - Direct Ignition System (DIS), 2 - Positive Crankcase Ventilation (PCV) Valve and Housing, 3 - Intake Air Mixing Chamber, 4 - Air Flow Sensor, 5 - Idle Air Flow Valve (AIC), 6 - Throttle Position Sensor (TPS), 7 - Air Filter Housing