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Engine Ignition System - 4.6l (3v) Ford Explorer Sport Trac II

Ignition System 2 illustrations ~305 words

Material

ItemSpecificationFill Capacity
Silicone Brake Caliper Grease and Dielectric Compound XG-3-AESE-M1C171-A

Material

GENERAL SPECIFICATIONS

ItemSpecification
Base ignition timing10 degrees before top dead center (BTDC)
Firing order1-3-7-2-6-5-4-8
Spark plug gap (early build - black coil boot) a1.15 +/- 0.13 mm (0.040-0.050 in)
Spark plug gap (late build - brown coil boot)1.05 +/- 0.05 mm (0.039-0.043 in)
Spark plug type (early build - black coil boot)PZT-14F
Spark plug type (late build - brown coil boot)HJFS-24FP

GENERAL SPECIFICATIONS

a Spark plug gap is not adjustable.

TORQUE SPECIFICATIONS

DescriptionNm
Coil-on-plug bolts5
Spark plugs (early build - black coil boot)34
Spark plugs (late build - brown coil boot)12

TORQUE SPECIFICATIONS

The electronic ignition system is a coil-on-plug ignition system. The coil-on-plug ignition system consists of the following components

  1. Crankshaft Position (CKP) sensor
  2. Ignition coils
  3. Spark plugs

The CKP sensor

  1. is a variable reluctance sensor.
  2. is triggered by a 36-minus-1 tooth sensor ring mounted on the crankshaft.
  3. provides base timing and crankshaft speed (RPM) to the PCM.

The 8 separate ignition coils

  1. change low voltage to high voltage pulses based on signals from the PCM.
  2. produce the high voltage pulses to the spark plugs.
  3. are connected directly to each spark plug.

The spark plugs

  1. change high voltage pulses into a spark which ignites the fuel and air mixture.
  2. originally equipped on the vehicle have a platinum-enhanced active electrode for long life.

Refer to the Introduction - Gasoline Engines article.

REMOVAL AND INSTALLATION

IMPORTANTBefore removing spark plugs, review TSB 08-7-6 SPARK PLUG REMOVAL INSTRUCTIONS - 4.6L 3V/5.4L 3V/6.8L 3V .

Scheme 1

Scheme 1: Engine Ignition Components - Exploded View
Scheme 1: Engine Ignition Components - Exploded View
ItemPart NumberDescription
114A464Ignition coil-on-plug electrical connector (4 required) (part of 12B637)
2W706175Ignition coil-on-plug bolt (4 required)
312A366Ignition coil-on-plug (4 required)
412405Spark plug (4 required)

Scheme 2

Scheme 2
Scheme 2
ItemPart NumberDescription
114A464Ignition coil-on-plug electrical connector (4 required) (part of 12B637)
2W706175Ignition coil-on-plug bolt (4 required)
312A366Ignition coil-on-plug (4 required)
412405Spark plug (4 required)
  1. For additional information, refer to the procedures in this article.

Ignition Coil-On-Plug

ItemSpecification
Silicone Brake Caliper Grease and Dielectric Compound XG-3-AESE-M1C171-A

Material

  1. Disconnect the 8 ignition coil electrical connectors.
  2. Remove the 8 ignition coil bolts. To install, tighten to 5 Nm (44 lb-in).
  3. Remove the 8 ignition coils.
  4. To install, reverse the removal procedure. Apply a light film of brake caliper grease to the inside of the coil boots before installation.

Spark Plugs

IMPORTANTBefore removing spark plugs, review TSB 08-7-6 SPARK PLUG REMOVAL INSTRUCTIONS - 4.6L 3V/5.4L 3V/6.8L 3V .

All vehicles

  1. Remove the ignition coil-on-plugs. For additional information, refer to «Ignition Coil-On-Plug»(/ford/explorer-sport-trac/ii-2006-2010/remont/ignition-system/#engine-ignition-system-46l-3v__ignition-coil-on-plug) .
  2. Remove the spark plugs. To install, tighten to 34 Nm (25 lb-ft).
  3. Remove the spark plugs. To install, tighten to 12 Nm (9 lb-ft).
  4. Inspect the spark plugs. Install new spark plugs as necessary. For additional information, refer to «ENGINE SYSTEM - GENERAL INFORMATION»(/ford/explorer-sport-trac/ii-2006-2010/remont/mechanical/#engine-system-general-information) article.
  5. To install, reverse the removal procedure.

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