Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
MKX 2.0L,
MKX 2.7L,
MKZ 2.0L,
Mustang 2.3L,
Navigator,
Taurus 2.0L,
Taurus 3.5L GTDI,
Transit 3.5L, and
Transit Connect 1.6L, GO to JF4 .
For all others, GO to JF2 .
JF2 CHECK THE FUNCTIONALITY OF THE SUSPECT COIL DRIVER CIRCUIT
• Ignition OFF.
• Suspect Coil Assembly connector disconnected.
• Remove the fuel pump fuse to disable the fuel pump.
• Connect the Deluxe Noid Lite and Signal Test Light Set AST7898 or equivalent between the IGN START/RUN and suspect coil driver, harness side.
• Observe the noid light while cranking the engine.
Does the noid light blink consistently?
Yes | No |
|---|---|
GO to JF3 . | GO to JF4 . |
JF3 CHECK THE FUNCTIONALITY OF THE SUSPECT COIL
• Ignition OFF.
• Carry out a visual inspection. Closely inspect the coil case and boot for carbon tracking, cracks and torn or incorrectly installed boots.
• Remove the suspect COP from the spark plug.
• Connect the Adjustable Ignition Spark Tester THX458 or equivalent.
• Suspect Coil Assembly connector connected.
• Crank the engine.
• Observe the spark tester while cranking the engine.
Is a bluish-white spark present?
Yes | No |
|---|---|
GO to Pinpoint Test Z . | INSTALL a new coil. If necessary, INSTALL a new spark plug. REFER to the Workshop Manual Section 303-07, Engine Ignition. |
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.