Rough Idle

Check:

1. Idle Control System
a. Hoses and Connections
b. Electronic Air Control Valve (EACV) (14)
2. Fuel Injector (16)
3. Exhaust Gas Recirculation (EGR) System (Cal: A/T only) (12)
4. Manifold Absolute Pressure (MAP) Sensor (3)(5)
5. 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.