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Engine Controls - Trouble Shooting - No Codes: Other Mercury Villager II

Testing & Diagnostics ~1459 words

NO CRANK

  1. Check battery voltage.
  2. Check starting circuit.
  3. Check starter motor.
  4. Check for seized engine or damaged flywheel.

HARD START/LONG CRANK

  1. Check for vacuum leaks.
  2. Check ignition system. See TEST JB in SELF-DIAGNOSTICS - VILLAGER article.
  3. Check fuel delivery system. See TEST HC in SELF-DIAGNOSTICS - VILLAGER article.
  4. Check idle air control systems. See TEST KE in SELF-DIAGNOSTICS - VILLAGER article.
  5. Check EGR system. See TEST HE in SELF-DIAGNOSTICS - VILLAGER article.
  6. Check radiator cooling fan operation (hard, hot start only).
  7. Check engine compression and mechanical condition.

STALL AFTER START

  1. Check for vacuum leaks.
  2. Check idle air control system. See TEST KE in SELF-DIAGNOSTICS - VILLAGER article.
  3. Check fuel delivery system. See TEST HC in SELF-DIAGNOSTICS - VILLAGER article.
  4. Check ignition system. See TEST JB in SELF-DIAGNOSTICS - VILLAGER article.
  5. Check EGR system. See TEST HE in SELF-DIAGNOSTICS - VILLAGER article.
  6. Check PCV system. See TEST HG in SELF-DIAGNOSTICS - VILLAGER article.
  7. Check intake air system. See TEST HU in SELF-DIAGNOSTICS - VILLAGER article.
  8. Check EVAP system. See TEST HX in SELF-DIAGNOSTICS - VILLAGER article.

NO-START/NORMAL CRANK

CAUTIONExtended cranking can cause damage to catalytic converter. After repairing NO-START condition, disconnect fuel injector connectors and crank engine until fuel is purged from exhaust system.
  1. Check fuel and ignition systems. See TEST A in SELF-DIAGNOSTICS - VILLAGER article.
  2. Check engine compression and mechanical condition.
  3. Check idle air control systems. See TEST KE in SELF-DIAGNOSTICS - VILLAGER article.
  4. Check for exhaust system restriction. See TEST HF in SELF-DIAGNOSTICS - VILLAGER article.

SLOW RETURN TO IDLE

  1. Check for vacuum leaks.
  2. Check air intake system.
  3. Ensure throttle linkage operates properly.
  4. Ensure idle air control system operates properly. See TEST KE in SELF-DIAGNOSTICS - VILLAGER article.
  5. Check fuel delivery system. See TEST HC in SELF-DIAGNOSTICS - VILLAGER article.
  6. Check PCV system. See TEST HG in SELF-DIAGNOSTICS - VILLAGER article.

IDLE SURGE, RUNS ROUGH OR MISSES

  1. Check for vacuum leaks.
  2. Check idle air control system. See TEST KE in SELF-DIAGNOSTICS - VILLAGER article.
  3. Check ignition system. See TEST JB in SELF-DIAGNOSTICS - VILLAGER article.
  4. Check fuel delivery system. See TEST HC in SELF-DIAGNOSTICS - VILLAGER article.
  5. Check EGR system. See TEST HE in SELF-DIAGNOSTICS - VILLAGER article.
  6. Check PCV system. See TEST HG in SELF-DIAGNOSTICS - VILLAGER article.
  7. Check engine compression and mechanical condition.

FAST IDLE, DIESELS/RUNS ON

  1. Ensure throttle plate and linkage operate properly.
  2. Check idle air control system. See TEST KE in SELF-DIAGNOSTICS - VILLAGER article.
  3. Check intake air system. See TEST HU in SELF-DIAGNOSTICS - VILLAGER article.
  4. Check for vacuum leaks.
  5. Check A/C system operation.
  6. Check cooling system.

LOW/SLOW IDLE, STALLS/QUITS

  1. Check idle air control system. See TEST KE in SELF-DIAGNOSTICS - VILLAGER article.
  2. Check fuel delivery system. See TEST HC in SELF-DIAGNOSTICS - VILLAGER article.
  3. Check EGR system. See TEST HE in SELF-DIAGNOSTICS - VILLAGER article.
  4. Check torque converter clutch operation.

STALLS/QUITS, HESITATION/STUMBLE

  1. Ensure base idle speed is correct. See ON-VEHICLE ADJUSTMENTS - TRUCKS article.
  2. Check idle air control systems. See TEST KE in SELF-DIAGNOSTICS - VILLAGER article.
  3. Check PCV system.
  4. Check ignition system. See TEST JB in SELF-DIAGNOSTICS - VILLAGER article.
  5. Check fuel delivery system. See TEST HC in SELF-DIAGNOSTICS - VILLAGER article.
  6. Check EGR system. See TEST HE in SELF-DIAGNOSTICS - VILLAGER article.
  7. Check torque converter clutch operation.
  8. Check engine compression and mechanical condition.
  9. Check EVAP system. See TEST HX in SELF-DIAGNOSTICS - VILLAGER article.
  10. Check exhaust system for leaks or restrictions.

RUNS ROUGH/MISSES

  1. Check ignition system. See TEST JB in SELF-DIAGNOSTICS - VILLAGER article.
  2. Check PCV system. See TEST HG in SELF-DIAGNOSTICS - VILLAGER article.
  3. Check fuel delivery system. See TEST HC in SELF-DIAGNOSTICS - VILLAGER article.
  4. Check idle air control system. See TEST KE in SELF-DIAGNOSTICS - VILLAGER article.
  5. Check EGR system. See TEST HE in SELF-DIAGNOSTICS - VILLAGER article.

SURGES

  1. Check for vacuum leaks.
  2. Check ignition system. See TEST JB in SELF-DIAGNOSTICS - VILLAGER article.
  3. Check idle air control system. See TEST KE in SELF-DIAGNOSTICS - VILLAGER article.
  4. Check fuel delivery system. See TEST HC in SELF-DIAGNOSTICS - VILLAGER article.
  5. Check EGR system. See TEST HE in SELF-DIAGNOSTICS - VILLAGER article.
  6. Check EVAP system. See TEST HX in SELF-DIAGNOSTICS - VILLAGER article.

BACKFIRES

  1. Check for vacuum leaks.
  2. Check ignition system. See TEST JB in SELF-DIAGNOSTICS - VILLAGER article.
  3. Check intake air system. See TEST HU in SELF-DIAGNOSTICS - VILLAGER article.
  4. Check EGR system. See TEST HE in SELF-DIAGNOSTICS - VILLAGER article.
  5. Check engine compression and mechanical condition.
  6. Check fuel delivery system. See TEST HC in SELF-DIAGNOSTICS - VILLAGER article.
  7. Check exhaust system. See TEST HF in SELF-DIAGNOSTICS - VILLAGER article.

LOSS OF POWER

  1. Check air intake system. See TEST HU in SELF-DIAGNOSTICS - VILLAGER article.
  2. Ensure throttle plate and linkage operate properly.
  3. Check ignition system. See TEST JB in SELF-DIAGNOSTICS - VILLAGER article.
  4. Check fuel delivery system. See TEST HC in SELF-DIAGNOSTICS - VILLAGER article.
  5. Check for restricted exhaust system.
  6. Check engine compression and mechanical condition.
  7. Ensure transmission is operating properly.
  8. Check for dragging brakes.

SPARK KNOCK

  1. Check cooling system for overheating.
  2. Check ignition system. See TEST JB in SELF-DIAGNOSTICS - VILLAGER article.
  3. Check fuel delivery system. See TEST HC in SELF-DIAGNOSTICS - VILLAGER article.
  4. Check knock sensor. See TEST DG in SELF-DIAGNOSTICS - VILLAGER article.
  5. Check PCV system. See TEST HG in SELF-DIAGNOSTICS - VILLAGER article.
  6. Check for vacuum leaks.
  7. Check EGR system. See TEST HE in SELF-DIAGNOSTICS - VILLAGER article.

POOR FUEL ECONOMY

  1. Check for slipping clutch or transmission.
  2. Check for dragging brakes.
  3. Check odometer calibration.
  4. Check vacuum system for leaks and routing.
  5. Check air intake system. See TEST HU in SELF-DIAGNOSTICS - VILLAGER article.
  6. Check fuel delivery system. See TEST HC in SELF-DIAGNOSTICS - VILLAGER article.
  7. Check ignition system. See TEST JB in SELF-DIAGNOSTICS - VILLAGER article.
  8. Check exhaust system. See TEST HF in SELF-DIAGNOSTICS - VILLAGER article.
  9. Check for restricted exhaust system.
  10. Check EGR system. See TEST HE in SELF-DIAGNOSTICS - VILLAGER article.
  11. Check PCV system. See TEST HG in SELF-DIAGNOSTICS - VILLAGER article.
  12. Check cooling system.
  13. Vehicle load, driving habits, road and weather conditions can also effect fuel economy.

EMISSIONS COMPLIANCE

If a vehicle fails an emission test, it is probable that catalytic converter was not hot enough immediately prior to the test, or the vehicle had idled excessively long prior to the test.

The following encompasses most of the emissions measurement modes of current state idle test procedures

  1. Ensure engine is at normal operating temperature and all accessories are turned off.
  2. Check emissions at idle.
  3. Operate engine at 2200-2800 RPM.
  4. Check emissions within 30 seconds.
  5. Return engine speed to idle.
  6. Check emissions within 30 seconds.

If any emission component is changed, PCM memory should be cleared before repeating state emission test procedure. See SELF-DIAGNOSTICS - VILLAGER article.

  1. Check ignition system. See TEST JB in SELF-DIAGNOSTICS - VILLAGER article.
  2. Check for vacuum leaks.
  3. Check fuel delivery system. See TEST HC in SELF-DIAGNOSTICS - VILLAGER article.
  4. Check EGR system. See TEST HE in SELF-DIAGNOSTICS - VILLAGER article.
  5. Check PCV system. See TEST HG in SELF-DIAGNOSTICS - VILLAGER article.
  6. Check EVAP system. See TEST HX in SELF-DIAGNOSTICS - VILLAGER article.
  7. Check intake air systems. See TEST HU in SELF-DIAGNOSTICS - VILLAGER article.
  8. Check for exhaust system restriction. See TEST HF in SELF-DIAGNOSTICS - VILLAGER article.
  9. Check condition of catalytic converter.
  10. Check cooling system.
  11. Check engine compression and mechanical condition.

WARNING INDICATOR LIGHTS

  1. If Malfunction Indicator Light (MIL) is on or flashing while driving, perform QUICK TEST. See SELF-DIAGNOSTICS - VILLAGER article.

HIGH OIL CONSUMPTION

  1. Ensure engine oil is at proper level. Check for proper oil dipstick application.
  2. Check engine for external oil leaks.
  3. Check PCV system. See TEST HG in SELF-DIAGNOSTICS - VILLAGER article.
  4. Visually inspect exhaust for blue smoke, indicating worn piston rings.
  5. Check for engine oil contamination/dilution from fuel or coolant.

COOLING SYSTEM RUNS HOT

  1. Check thermostat operation.
  2. Check cooling system for restrictions or leaks.
  3. Check cooling fan operation.
  4. Check temperature gauge accuracy.
  5. Check ignition timing.
  6. Check engine mechanical condition.

COOLING SYSTEM RUNS COLD

  1. Check cooling system thermostat.
  2. Check temperature gauge accuracy.

EXHAUST SMOKE OR SMELL

  1. Check air intake system. See TEST HU in SELF-DIAGNOSTICS - VILLAGER article.
  2. Check fuel delivery system. See TEST HC in SELF-DIAGNOSTICS - VILLAGER article.
  3. Check PCV system. See TEST HG in SELF-DIAGNOSTICS - VILLAGER article.
  4. Check exhaust system. See TEST HF in SELF-DIAGNOSTICS - VILLAGER article.
  5. Check EGR system. See TEST HE in SELF-DIAGNOSTICS - VILLAGER article.
  6. Check engine compression and mechanical condition.
  7. Check cooling system.

FUEL ODOR

  1. Check fuel delivery system. See TEST HC in SELF-DIAGNOSTICS - VILLAGER article.
  2. Check EVAP system. See TEST HX in SELF-DIAGNOSTICS - VILLAGER article.
  3. Check PCV system. See TEST HG in SELF-DIAGNOSTICS - VILLAGER article.

Intermittent Simulation

To reproduce the conditions creating an intermittent fault, use the following methods

  1. Lightly vibrate components.
  2. Heat component.
  3. Wiggle or bend wiring harness.
  4. Spray component with water.
  5. Remove/apply vacuum source.

Monitor circuit/component voltage or resistance while attempting to simulate intermittent. Use the results to identify a faulty component or circuit.

More articles — Engine Controls - Trouble Shooting - No Codes