Home » Duramax LLY » Duramax LLY – Turbocharger Diagnosis – Low Power Poor Acceleration (Black smoke not evident at 1/2 to wide open throttle)

Duramax LLY – Turbocharger Diagnosis – Low Power Poor Acceleration (Black smoke not evident at 1/2 to wide open throttle)

POTENTIAL CAUSE

1. Lean fuel mixture caused by insufficient fuel volume or pressure.

CORRECTION

1. Problem is in fuel delivery system. Check fuel supply pump pressure, look for leaks in lines and at fittings, plugged fuel filter, accelerator cable problem, injection pump problem. Refer to low power information in guides for standard diagnosis.

 

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