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Engine Ignition System - 4.6L (3V): Specifications Ford Explorer IV

Ignition System ~146 words

GENERAL SPECIFICATIONS

ItemSpecification
Lubricants and Chemicals
Silicone Brake Caliper Grease and Dielectric Compound XG-3-AESE-M1C171-A
Engine Ignition
Base ignition timing10 degrees BTDC
Firing order1-3-7-2-6-5-4-8
Spark plug typePZT1F
Spark plug gap (not adjustable)1.02-1.28 mm (0.040-0.050 in)

GENERAL SPECIFICATIONS

TORQUE SPECIFICATIONS

DescriptionNm
Spark plugs34
Coil-on-plug bolts5

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 powertrain control module (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 plug

  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 .