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Diagnosis and Testing|Removal and Installation > < 303-07A Engine Ignition - 1.6L Zetec-SE (Sigma)-1.4L|Specifications

Focus 1999 (08.1998-12.2004)

Engine Ignition - 1.6L Zetec-SE (Sigma)/1.4L - Engine Ignition Focus 1999 (08/1998-12/2004)
Diagnosis and Testing

General Equipment
Worldwide Diagnostic System (WDS)

Inspection and Verification

  1. Verify the customer concern.
  1. Visually inspect for obvious signs of electrical damage.

Visual Inspection Chart

Electrical
  • Wiring harness
  • Electrical connector(s)
  • Spark plug(s)
  • Spark plug wire(s)
  • Ignition coil pack
  • Powertrain control module (PCM)
  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  1. If the cause is not visually evident, verify the symptom and refer to the Symptom Chart.

Symptom Chart

Symptom Chart

Symptom Possible Sources Action
Engine cranks but does not start
*
Spark plug(s).
*
Spark plug wire(s).
*
CARRY OUT a KV test using WDS. INSTALL new ignition components as necessary. TEST the system for normal operation.
*
Ignition coil pack.
*
PCM.
*
PCM calibration.
*
Circuit.
*
REFER to the WDS. INSTALL new ignition components as necessary. TEST the system for normal operation.
Engine misfire
*
Spark plug(s).
*
Spark plug wire(s).
*
CARRY OUT a KV test using the WDS.
*
Ignition coil pack.
*
PCM.
*
PCM calibration.
*
REFER to the WDS.
*
Low cylinder compression.
*
CARRY OUT a engine compression test.
*
Worn or damaged valve(s), tappet(s) or camshaft(s).
*
REMOVE the cylinder head.
REFER to: Cylinder Head (303-01A, In-vehicle Repair).
INSPECT the cylinder head, valves, tappets and camshafts for signs of wear or damage.
*
Low fuel pressure.
*
Fuel injection supply manifold.
*
Fuel pressure regulator.
*
REFER to: Fuel Charging and Controls (303-04A Fuel Charging and Controls - 1.6L Zetec-SE (Sigma)/1.4L, Diagnosis and Testing).
*
Low fuel pressure.
*
Fuel pump.
*
REFER to: Fuel Tank and Lines (310-01, Diagnosis and Testing).
Engine stumbling
*
Spark plug(s).
*
Spark plug wire(s).
*
CARRY OUT a KV test using WDS.
*
Ignition coil pack.
*
PCM.
*
PCM calibration.
*
REFER to the WDS.
*
Low cylinder compression.
*
CARRY OUT a engine compression test.
*
Worn or damaged valve(s), tappet(s) or camshaft(s).
*
REMOVE the cylinder head.
REFER to: Cylinder Head (303-01A, In-vehicle Repair).
INSPECT the cylinder head, valves, tappets and camshafts for signs of wear or damage.
*
Low fuel pressure.
*
Fuel injection supply manifold.
*
Fuel pressure regulator.
*
REFER to: Fuel Charging and Controls (303-04A Fuel Charging and Controls - 1.6L Zetec-SE (Sigma)/1.4L, Diagnosis and Testing).
*
Low fuel pressure.
*
Fuel pump.
*
REFER to: Fuel Tank and Lines (310-01, Diagnosis and Testing).
Engine lacks power
*
Spark plug(s).
*
Spark plug wire(s).
*
CARRY OUT a KV test using WDS.
*
Ignition coil pack.
*
REFER to the WDS.
*
Low cylinder compression.
*
CARRY OUT a engine compression test.
*
Worn or damaged valve(s), tappet(s) or camshaft(s).
*
REMOVE the cylinder head.
REFER to: Cylinder Head (303-01A, In-vehicle Repair).
INSPECT the cylinder head, valves, tappets and camshafts for signs of wear or damage.
*
Low fuel pressure.
*
Fuel injection supply manifold.
*
Fuel pressure regulator.
*
REFER to: Fuel Charging and Controls (303-04A Fuel Charging and Controls - 1.6L Zetec-SE (Sigma)/1.4L, Diagnosis and Testing).
*
Low fuel pressure.
*
Fuel pump.
*
REFER to: Fuel Tank and Lines (310-01, Diagnosis and Testing).

Diagnosis and Testing|Removal and Installation > < 303-07A Engine Ignition - 1.6L Zetec-SE (Sigma)-1.4L|Specifications