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OnlineHelp
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how to change ignition coil 1999 lincoln towncar

Resolved Question:

how to change ignition coil 1999 lincoln towncar
Submitted: 7 years ago.
Category: Car
Expert:  OnlineHelp replied 7 years ago.
Hello and thank you for choosing Just Answer.

It's actually simple to remove. It is held by one screw and has one electrical connector to it. The tricky part is that you may need to remove the air duct to get to it.

Remove and Install

  1. Disconnect battery negative cable from battery and properly isolate to prevent accidental reconnection.
  2. Remove or disconnect the following:
    • Air cleaner outlet pipe
    • Connector from the ignition coils
    • Bolt from the ignition coil
    • Ignition coil from spark plug
      Click image to see an enlarged viewIgnition coil, plug and bolt location

To install:

  1. Install or connect the following:
    • Ignition coil to spark plug
    • Bolt and torque to 89 inch lbs. (10 Nm)
    • Electrical connector
    • Air cleaner outlet pipe
Testing
Primary Winding Resistance
  1. Turn the ignition OFF.
  2. Disconnect the negative battery cable.
Click image to see an enlarged viewTesting the primary ignition coil resistance–4.6L engine
  1. Disconnect the wiring harness from the ignition coil.
  2. Check for dirt, corrosion or damage on the terminals and repair as necessary.
  3. Measure coil primary resistance between ignition coil pin 2 (B+) and pins 1 (coil 2), 2 (coil 3) and 3 (coil 1).
  4. Resistance should be 0.3–1.0 ohms. If resistance is out of specifications, replace the coil pack. If resistance is within specifications, proceed to secondary windings testing.
Secondary Winding Resistance
  1. Measure coil secondary resistance between the corresponding spark plug wire towers on the coil.
    • Coil 1—cylinders 1 and 6
    • Coil 2—cylinders 3 and 5
    • Coil 3—cylinders 4 and 7
    • Coil 4—cylinders 2 and 8
Click image to see an enlarged viewTesting the secondary ignition coil resistance–4.6L engine
  1. Resistance should be 12.8–13.1 kilohms. If secondary resistance is not within specification, replace the coil pack.
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