ignition

Spark Plug Wires

for 2014 Ram 2500 6.7L I6 Cummins Diesel · 4WD

Difficulty

Expert

Time

1.7 h

Tools

Steps

This procedure addresses a vehicle incompatibility: the 2014 Ram 2500 with 6.7L Cummins Diesel engine does not use spark plug wires, as diesel engines use compression ignition instead of spark ignition.

Warnings

⚠️PROCEDURE NOT APPLICABLE: The 6.7L Cummins is a diesel engine that does not have spark plugs or spark plug wires. Diesel engines use compression ignition and glow plugs for cold starting assistance.

ℹ️If you are experiencing ignition-related issues, the 6.7L Cummins uses glow plugs (not spark plugs) which are serviced differently. The engine also has fuel injectors and a high-pressure fuel system that may require diagnosis.

Preparation

Verify the actual concern or diagnostic trouble codes present on the vehicle
Confirm whether glow plug replacement, fuel injector service, or other diesel-specific repair is actually needed

Procedure

1
Identify Correct Service Procedure
The 6.7L Cummins Turbo Diesel engine in the 2014 Ram 2500 does not utilize spark plugs or spark plug wires. This is a compression-ignition diesel engine. If engine performance issues are present, diagnose concerns related to glow plugs, fuel injectors, fuel pressure, turbocharger operation, or diesel-specific components. Refer to glow plug replacement or fuel system service procedures as appropriate for the actual concern.