ASE A9 Light Vehicle Diesel Engines Practice Questions - ASE A9 - Light Vehicle Diesel Engines Certification Exam

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A diesel engine has a rough idle and a scan tool shows one cylinder's injector fuel-balance (contribution) value is much higher than the others. This MOST directly indicates:

That cylinder is producing too much power and the ECM is reducing its fuel That cylinder is weak, so the ECM is commanding extra fuel to that injector to balance speed The crankshaft position sensor is failing The intake air temperature sensor is biased high

Correct Answer:

That cylinder is weak, so the ECM is commanding extra fuel to that injector to balance speed

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