Inspection After Removal

WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.

Clean the injector bores from built up carbon with Tool (A).

Courtesy of NISSAN NORTH AMERICA, INC.

Tool

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NOTE: Use suitable tool to clean fuel injector bore prior to installation of fuel injector.
Inspect the fuel injector tip for carbon deposits or corrosion.
Check for terminal damage.
Check the resistance. Resistance should measure between 150 to 210 kOhms.
Inspect the fuel injector inlet and high-pressure connector tip for damage.
NOTE: Overheating will cause the nozzle to turn a dark yellow/tan or blue color, depending on the degree of overheating.
Replace any damaged components.
NOTE: Do not attempt to clean the fuel injector tip. The fuel injector nozzle could become plugged and cause performance problems.