Misfire/Rough Running

SYMPTOM: Misfire Or Rough Running

CHECK
1. Electronic Control Unit (ECU) (**)
2. Fuel Injectors (16)
3. Electronic Air Control Valve (EACV) (14)
4. Exhaust Gas Recirculation System [Automatic Transmission]

Numbers in parentheses are the blink codes displayed on back of the ECU. (**) LED on the ECU is not on, or stays on without blinking. Notes on Reading Diagnostic List For ECU trouble code component testing procedures see Computers and Control Systems.