In testing emission control devices any of the following tests may be
performed as necessary, applicable or useful:
-
Exhaust Gas Recirculation Valve.
-
Positive Crankcase Ventilation (PCV) Valve.
-
Air Pump
-
Carburetor Adjustments for Vehicles Without Feedback Systems,
-
Lean-misfire Adjustment.
-
Lean-drop Adjustment.
-
Accelerator Pump.
-
Power Valve.
-
High Fuel Level in Float Chamber.
-
Testing the Cooling System for Combustion Gases.
-
Fuel Leak.
-
Exhaust Leak.
-
Testing for Fumes in the Passenger Compartment.
-
No-start Condition – Fuel.
The following section provides a brief description of the screens that will
be encountered during the Free Measurement Procedure
8.1
The Free Measurement Screen
Figure 8-1 The Free Measurement Screen
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