A vehicle has a crimped fuel return line. What effect will this have on 5-Gas Analyzer gas readings?
A) O2 increases
B) HC decreases
C) CO decreases
D) NOX stays the same
Answer (2)
A crimped fuel return line can lead to elevated O2 levels, reduced HC and CO emissions while potentially keeping NOx concentrations steady. This is due to the engine operating under leaner conditions and improved combustion efficiencies. Understanding these changes is crucial for evaluating vehicle emissions effectively. ;
A crimped fuel return line typically causes an increase in O2 levels, a decrease in HC and CO emissions, while the NOx emissions may remain unchanged. The engine runs leaner due to the restricted fuel flow, altering combustion efficiency and emissions. Therefore, the correct answer is A) O2 increases.
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