NOx readings at idle should be less than ________.

[charchew]

Question 1

HC and CO are high and CO₂ and O₂ are low. This could be caused by a ________.
◦ Rich mixture
◦ Lean mixture
◦ Defective ignition component
◦ Clogged EGR passage

Question 2

NOx readings at idle should be less than ________.
◦ 100 ppm
◦ 10 ppm
◦ 1 ppm
◦ None of these is correct

[duke02]

Answer 1

Rich mixture

Answer 2

100 ppm

[charchew]

Thanks for the timely response, appreciate it

[patma1981]

Wow, this really help