Technical Service Bulletin IB09J003C — 2011 ISUZU N-SERIES

The following table contains many possible causes for the following symptoms. -Hard Start/No Start -Rough, Misfire, Unstable or Incorrect Idle -Surges, Lack of Power, Hesitation, Lag or Stumble While some of these symptoms may lead to component replacement, the replacement should not be considered a completed repair. These types of symptoms have a high probability for a repeat repair since the true source of the failure is typically fuel contamination. In order to improve the overall repair and reduce the potential repeat failures, the procedure below is provided to assist in identifying the source of fuel contamination. Additionally, this bulletin will provide information to clarify the meaning of injector balancing rates and how to apply the values when trying to diagnose the Isuzu common rail fuel system.