Misfire or Rough Running

SYMPTOM: Misfire Or Rough Running

CHECK
- Electronic Control Module (**)
- Fuel Injector (16)
- Manifold Absolute Pressure Sensor (3) (5)
- Idle Air Control (IAC) Valve (14)
- EGR Control System (12)
- Fuel Supply
- Crank/Cyl Position Sensor (4) (54) (9) (59)



Numbers in parentheses are the blink codes displayed at the MALFUNCTION INDICATOR LAMP. (**) MALFUNCTION INDICATOR LAMP stays on without blinking. For ECM trouble code component testing procedures see COMPUTERS AND CONTROL SYSTEMS.