Question

A vehicle has a crimped fuel return line. What effect will this have on 5-Gas analyzer gas readings?

A.CO decreases
B.NOx stays the same
C.O2 increase
D. Hc decreases

Answer 1

Answer:

D.

Explanation:

NOx remains relatively static. It might increase slightly, but NOx does not normally increase from rich air/fuel mixtures. The other three gases will change with a crimped closed fuel return line.

Answer 2

Answer:

d.) Hc decreases

Explanation:

hope this helps!