Tier 3 standards reduce the amount of ________ in gasoline. A) ...

[sjones]

Tier 3 standards reduce the amount of ________ in gasoline.
 
  A) Sulfur B) Hydrocarbons C) Fumes D) Ash

Question 2

Technician A says that a low-restriction exhaust system could prevent a back pressure-type vacuum-controlled EGR (Exhaust Gas Recirculation) valve from opening correctly. Technician B says that a restricted exhaust can cause the EGR valve position sensor to fail. Which technician is correct?
 
  A) Technician A B) Technician B C) Both technicians D) Neither technician

[zhanghao]

Answer to Question 1

A

Answer to Question 2

C

[sjones]

Thanks for the timely response, appreciate it

[jamesnevil303]

Great answer, keep it coming