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Fuel Trim Is Being Discussed

Question 29

Multiple Choice

Fuel trim is being discussed. Technician A says a + 12.0 percent LTFT value indicates that the system is running 12 percent richer than normal. Technician B says LTFT should constantly change between positive and negative values when the system is running in closed loop. Who is correct?


A) A only
B) B only
C) both A and B
D) neither A nor B

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