Avenger, Sebring Coupe, Stratus Coupe, 1999-2006

Ignition Coil

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The 2.0L and 2.4L engines use a "waste fire" ignition system that uses one ignition coil to fire a bi-polarity spark into two cylinders. The forward polarity spark fires during the power stroke while the reverse polarity spark fires simultaneously during the exhaust stroke of an adjacent cylinder. Coil one fires cylinders 1 and 4, coil two fires cylinders 2 and 3. Each coil tower is labeled with the number of the corresponding cylinder.


CAUTION
The ignition system generates approximately 32,000 volts. Personal injury could result from contact with this system.

Removal & Installation



2.0L & 2.4L Engines

The electronic ignition coil pack attaches directly to the valve cover.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Disconnect electrical connector from coil pack
     
    Remove coil pack mounting nuts
     
    Remove coil pack

    Click image to see an enlarged view

    Fig. Ignition coil pack-2.0L and 2.4L Engine



    Click image to see an enlarged view

    Fig. Testing for spark at coil

     

  4.  

To install:

  1. Install or connect the following
    NOTE
    The coil pack towers are numbered with the cylinder identification. Be sure the ignition cables snap onto the towers



    Coil pack on valve cover
     
    Spark plug cables to new coil pack
     

  2.  

The electronic ignition coil pack is mounted to the cylinder head cover.

  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the electrical connector from coil pack.
  4.  
  5. Remove the spark plug cables, twist and pull cables to remove.
  6.  
  7. Remove the coil pack mounting bolts.
  8.  
  9. Remove the coil pack.
  10.  

To install:

  1. Install the coil pack on cylinder head cover.
  2.  
  3. Install the bolts and tighten bolts to 106 inch lbs. (12 Nm).
  4.  
  5. Connect the electrical connector.
  6.  
  7. Transfer spark plug cables to new coil pack. The coil pack towers are numbered with the cylinder identification. Make sure the ignition cables snap onto the towers.
  8.  

2.7L Engine

The ignition system uses a coil on plug assembly and has an ignition coil for every cylinder mounted directly over each spark plug (if equipped).

  1. Use compressed air to clean area around ignition coils and spark plugs.
  2.  
  3. Remove the electrical connector from ignition coil.
  4.  
  5. Remove the 2 fasteners from ignition coil assembly.
  6.  
  7. Remove the ignition coil assembly.
  8.  

To install:

  1. Install the ignition coil assembly for spark plug.
  2.  
  3. Install the coil screws and tighten to 55 inch lbs. (6.2 Nm).
  4.  
  5. Connect the electrical connector.
  6.  

Testing



The ignition coil is tested by checking the Diagnostic Trouble (DTC) memory. For information on checking the DTC memory and clearing the codes refer to the Engine Performance & Emission Controls section of this manual.

2.0L & 2.4L Engines
Resistance Test
  1. Remove ignition cables and measure the electrical resistance.
    1. Replace any cable not within tolerance.
    2.  

  2.  
  3. Disconnect the electrical connector from the coil pack.
  4.  
  5. Measure the primary resistance of each coil.
    NOTE
    Connect an ohmmeter between the B+ pin and the pin corresponding to the cylinders in question.



    Resistance on the primary side of each coil should be 0.45-0.65 ohm at 70° to 80° F.
     

  6.  
  7. Replace the coil if resistance is not within tolerance
  8.  
  9. Remove ignition cables from the secondary towers of the coil.
  10.  
  11. Measure the secondary resistance of the coil between the towers of each individual coil.

    Secondary resistance should be 10,900 to 14,700 ohms. Replace the coil if resistance is not within tolerance
     

  12.  

Testing For Spark At Coil

CAUTION
The direct-ignition system generates approximately 40,000 volts. Personal injury could result from contact with this system.


WARNING
Spark plug wire damage may occur if the spark plug is moved more than 1/4 inch away from the engine ground.


WARNING
Do not leave any one spark plug cable disconnected any longer than 30 seconds or possible heat damage to catalytic converter will occur.


CAUTION
Test must be performed at idle and in park only with the parking brake on.


NOTE
New isolated engine valve cover may not provide adequate ground. Use engine block as engine ground.

  1. To perform the test:
    CAUTION
    Do not hold with your hand.



    Use a new spark plug and spark plug cable
     
    The coil pack contains two independent coils. Each coil must be checked individually.
     
    Insert a new spark plug into the new spark plug boot. Ground the plug to the engine.
     

  2.  
  3. Starting with coil insulator #1, remove it from the ignition coil.
  4.  
  5. Plug the test spark plug cable onto #1 coil tower. Make sure a good connection is made; there should be a positive click.
  6.  
  7. Crank the engine and look for spark across the electrodes of the spark plug
    WARNING
    Always install the cable back on the coil tower after testing to avoid damage to the coil and catalytic converter.

  8.  
  9. Repeat the test for the remaining coils
    1. Watch for weak, irregular or no spark and replace the ignition coil pack if necessary.
    2.  

  10.  

 
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