Misfire or Rough Running

NOTE: The systems that could be the source of the symptoms are listed and should be checked in the order they are listed, beginning with # 1.

1. Fuel Supply
a. Manifold Absolute Pressure (MAP) Sensor
b. Fuel Injector (code 16)
c. Pressure Regulator
d. Idle Air Control (IAC) Valve
2. TDC/CRANK/CYL Position Sensor (code 4,8,9)
3. Engine Control (ECM) Module (BU)

(BU) Back-up code used when the MALFUNCTION INDICATOR WARNING LAMP is on. Jump the service check connector, if no code is displayed (MALFUNCTION INDICATOR WARNING LAMP stays on steady), the back-up system is in operation.

NOTE: On Canadian models the MALFUNCTION INDICATOR WARNING LAMP is the CHECK ENGINE LAMP.