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Home >> Honda >> 1992 >> Prelude L4-2.3L DOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Poor Performance >> Fails Emission Test
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Fails Emission Test

Check:

1. Emission Control System
a. Evaporative Emission Controls
b. Catalytic Converter
2. Manifold Absolute Pressure (MAP) Sensor (3)(5)
3. Fuel Supply System
a. Pressure Regulator
b. Fuel Injector
c. Injector Resistor
4. Oxygen Sensor(s) (1)(2)
5. Idle Control System
a. Hoses and Connections
6. Electronic Control (ECU) Unit (BU)

NOTE:
After each symptom, the system that could be the source of the symptom are listed and should be checked in the order they are listed, beginning with #1.

(BU) code used when the CHECK ENGINE warning light is on, and the self-diagnosis indicator LED is ON with no "blinks", the back-up system is in operation.

Self-diagnosis indicator, (LED) blinks (?), will follow associated systems.

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