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Home >> Pontiac >> 2003 >> Sunfire Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Trouble Shooting - No Codes - 2.2L >> Symptoms >> Cuts Out, Misses >> Sensor/System

Cuts Out, Misses: Sensor/System

  1. Test the fuel injectors. Go to FUEL INJECTOR BALANCE TEST WITH SPECIAL TOOL , FUEL INJECTOR BALANCE TEST WITH TECH 2 , or FUEL INJECTOR COIL TEST under FUEL SYSTEMS (GASOLINE) in SYSTEM & COMPONENT TESTING - 2.2L ALERO, CAVALIER, GRAND AM & SUNFIRE article.
  2. Check for a restricted fuel filter. Go to FUEL SYSTEM DIAGNOSIS (GASOLINE) under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - 2.2L ALERO, CAVALIER, GRAND AM & SUNFIRE article.
  3. Test for incorrect fuel pressure. Go to FUEL PRESSURE TEST under FUEL SYSTEMS (GASOLINE) in BASIC DIAGNOSTICS PROCEDURES - 2.2L ALERO, CAVALIER, GRAND AM & SUNFIRE article.
  4. Check for fuel in the fuel pressure regulator vacuum hose. If fuel is found in the hose replace the fuel pressure regulator.
  5. Check for a contaminated fuel condition. Go to ALCOHOL/CONTAMINANTS-IN-FUEL DIAGNOSIS WITH SPECIAL TOOL or ALCOHOL/CONTAMINANTS-IN-FUEL DIAGNOSIS WITHOUT SPECIAL TOOL under FUEL SYSTEMS (GASOLINE) in SYSTEM & COMPONENT TESTING - 2.2L ALERO, CAVALIER, GRAND AM & SUNFIRE article.
  6. Check for the following conditions that may cause the engine to run rich:
    • Any water intrusion in the HO2S connector.
    • The engine oil contaminated by fuel.
    • An EVAP canister purge condition.
    • Incorrect fuel pressure. Go to FUEL PRESSURE TEST under FUEL SYSTEMS (GASOLINE) in BASIC DIAGNOSTIC PROCEDURES - 2.2L ALERO, CAVALIER, GRAND AM & SUNFIRE article.
    • A leaking fuel pressure regulator.
    • Any leaking fuel injectors.
    • Any vacuum hoses that are split, kinked, or improperly connected.
    • An air intake duct that is collapsed or restricted.
    • An air filter that is dirty or restricted.
  7. Check for the following conditions that may cause the engine to run lean:
    • Any water intrusion in the HO2S connector.
    • An exhaust leak between the HO2S and the engine.
    • Any vacuum leaks.
    • Incorrect fuel pressure. Go to FUEL PRESSURE TEST under FUEL SYSTEMS (GASOLINE) in BASIC DIAGNOSTIC PROCEDURES - 2.2L ALERO, CAVALIER, GRAND AM & SUNFIRE article.
    • Any restricted fuel injectors.
    • Fuel contamination.
    • Any vacuum hoses that are split, kinked, or improperly connected.
  8. Use a scan tool to monitor the Knock Sensor (KS) system for excessive spark retard activity.
  9. Check for throttle body tampering, excessive deposits, or damage.
  10. Check the Throttle Position (TP) sensor and related circuits.
  11. Check the crankcase ventilation system for proper operation.
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