LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2000 >> Contour SE, 2.0 3, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2762 (Engine Controls - Pinpoint Test Hg: Positive Crankcase Ventilation (PCV) System Through Pinpoint Test JD: Crankshaft Position (CKP) Sensor - (Except Diesel & Hybrid)) >> Pinpoint Test JC: Secondary Ignition (Coil Pack) >> Test Procedure

Test Procedure

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2005 Mercury Sable, 2005 Mercury Mountaineer, 2005 Mercury Monterey, 2005 Mercury Montego, and 2005 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
  1. JC1 VISUAL INSPECTION OF THE IGNITION SYSTEM 
    • Visually inspect the engine compartment to make sure all coils and spark plug wires are properly and securely connected.
    • Examine all wiring harnesses and connectors for damaged, burned or overheated insulation and loose or broken conditions.
    • Make sure the vehicle battery is in good condition and all accessories are turned off.

    Is a problem indicated? 

    Yes No
    REPAIR as necessary. For Coil pack using engine analyzer.
    GO to  JC2.
    For Coil pack not using engine analyzer.
    GO to  JC11.
  2. JC2 CONNECT THE ENGINE ANALYZER 
    • Obtain an engine analyzer to diagnose concerns in the secondary side of the ignition system.

    Is the engine analyzer connected? 

    Yes No
    GO to  JC3. REPEAT Step JC2.
  3. JC3 CHECK FOR IGNITION PATTERN 
    Fig 1: Identifying Ignition Flat Pattern
    G03878124Courtesy of FORD MOTOR CO.
    • Observe the pattern on a scope while cranking the engine.

    Is the pattern flat, which indicates no spark on all cylinders? 

    Yes No
    Key in OFF position.
    IGN/START/RUN circuit concern.
    CHECK the condition of related fuses/fuse links. If OK, REPAIR the open circuit. If the fuse/fuse link is damaged, CHECK the IGN START/RUN circuit for a short to ground. REPAIR as necessary.    		 GO to  JC4.
  4. JC4 CHECK FOR A NORMAL IGNITION PATTERN 
    NOTE: Spark plugs may be fired more than once per combustion event. Multi-strike operating mode is RPM dependent.
    Fig 2: Identifying Normal Ignition Pattern
    G03878125Courtesy of FORD MOTOR CO.
    • Key on, start the engine. If no start, crank the engine.

    Are the patterns even and is the average value of spark plug firing voltage between 9 kV and 15 kV (higher during engine crank/no start)? 

    Yes No
    GO to PINPOINT TEST Z STEP 11 . GO to  JC5.
  5. JC5 IGNITION PATTERN EVALUATION 

    Is the ignition pattern normal? 

    Yes No
    GO to  JC6. GO to  JC7.
  6. JC6 TEST DIRECTION 

    Were you directed to this pinpoint test from pinpoint test step A9? 

    Yes No
    GO to PINPOINT TEST A STEP 10 . GO to  JC7.
  7. JC7 CHECK FOR MISSING SPARK PATTERNS 
    Fig 3: Identifying Missing Spark Patterns
    G03878126Courtesy of FORD MOTOR CO.

    Is the spark pattern inconsistent? 

    Yes No
    INSPECT the spark plug wires for missing cylinders. MEASURE the resistance of the spark plug wires. INSTALL a new spark plug wire if the resistance is greater than 7, 000 ohms per 30.5 cm (1 foot).
    GO to PINPOINT TEST JE STEP 1 .    		 GO to  JC8.
  8. JC8 CHECK FOR A HIGH SPARK PLUG FIRING VOLTAGE 
    Fig 4: Identifying High Spark Plug Firing Voltage
    G03878127Courtesy of FORD MOTOR CO.

    Is the average value of the spark plug firing voltage greater than 15 Kv? 

    Yes No
    INSPECT the spark plug wires for missing cylinders. MEASURE the resistance of the spark plug wires. INSTALL a new spark plug wire if the resistance is greater than 7, 000 ohms per 30.5 cm (1 foot). GO to  JC9.
  9. JC9 CHECK FOR LOW SPARK PLUG FIRING VOLTAGE 
    Fig 5: Identifying Low Spark Plug Firing Voltage Pattern
    G03878128Courtesy of FORD MOTOR CO.
    • CHECK the spark plug firing voltage average pattern.

    Is there consistently low spark plug firing voltage or sloping sparkline on one or more cylinders? 

    Yes No
    INSPECT the spark plug wires for missing cylinders. MEASURE the resistance of the spark plug wires. INSTALL a new spark plug wire if the resistance is greater than 7, 000 ohms per 30.5 cm (1 foot).
    MEASURE the resistance of the spark plug(s). INSTALL a new spark plug(s) if the resistance is lower than 2, 000 or higher than 20, 000 ohms.    		 GO to  JC10.
  10. JC10 CHECK FOR EVENNESS BETWEEN CYLINDERS 
    Fig 6: Identifying Unevenness Between Cylinders Pattern
    G03878129Courtesy of FORD MOTOR CO.
    • CHECK the spark plug firing voltage average pattern.

    Is the evenness of spark plug firing voltage greater than 6 kV? 

    Yes No
    INSPECT the spark plug wires for missing cylinders. MEASURE the resistance of the spark plug wires. INSTALL a new spark plug wire if the resistance is greater than 7, 000 ohms per 30.5 cm (1 foot).
    CHECK for damaged spark plugs or narrow spark plug gaps.
    MEASURE the resistance of the spark plugs. INSTALL a new spark plugs if the resistance is if lower than 2, 000 or higher than 20, 000 ohms.    		 GO to PINPOINT TEST Z STEP 1 .
  11. JC11 DTC P0301 THROUGH P0306: MISFIRE ON CYLINDERS 1 THROUGH 6 

    Are any of the above listed DTCs present? 

    Yes No
    GO to  JC12. GO to  JC13.
  12. JC12 CHECK FOR SPARK AT THE CYLINDER(S) INDICATED BY THE DTC(S) 
    • Disable the inertia switch.
    • Disconnect the spark plug wire(s) from the spark plug(s).
    • Connect the air gap spark tester 303-D037 (D81P-6666-A) or its equivalent to a spark plug wire.
    • Check for spark while cranking the engine.

    Is the bluish-white spark present? 

    Yes No
    Key in OFF position.
    GO to  JC14.    		 Key in OFF position.
    INSPECT the spark plug wires for missing cylinders. MEASURE the resistance of the spark plug wires. INSTALL a new spark plug wire if the resistance is greater than 7, 000 ohms per 30.5 cm (1 foot).
    If the spark plug wires are OK,
    GO to PINPOINT TEST JE STEP 1 .
  13. JC13 CHECK FOR SPARK AT ALL CYLINDERS 
    • Disable the inertia switch.
    • Disconnect the spark plug wire(s) from the spark plug(s).
    • Connect the air gap spark tester 303-D037 (D81P-6666-A) or its equivalent to a spark plug wire.
    • Check for spark while cranking the engine.

    Is the bluish-white spark present? 

    Yes No
    Key in OFF position.
    GO to  JC14.    		 Key in OFF position.
    INSPECT the spark plug wires for missing cylinders. MEASURE the resistance of the spark plug wires. INSTALL a new spark plug wire(s), if the resistance is greater than 7, 000 ohms per 30.5 cm (1 foot).
    If the spark plug wires are OK,
    GO to PINPOINT TEST JE STEP 1 .
  14. JC14 CHECK THE SPARK PLUGS 
    • Check for damaged spark plugs or narrow spark plug gaps.

    Are the plugs OK? 

    Yes No
    GO to  JC15. REPAIR the plugs. ADJUST the gap or INSTALL a new plug as necessary.
  15. JC15 CHECK THE SPARK PLUG RESISTANCE 
    • Measure the spark plug resistance.

    Is the resistance between 2, 000 and 20, 000 ohms? 

    Yes No
    GO to PINPOINT TEST Z STEP 1 . INSTALL a new spark plug(s).
scientia non olet · About LEMON Manuals