EGR components and identification

What does EGR stand for?

• Exhaust Gas Rod

• Exhaust Gas Re-circulation

• Engine Gas Return

What particular Emissions are lessened by the EGR?

• NOS

• NOx

• H2O

EGR raises the combustion chamber temperatures

• True

• False

What sensor provides information about the EGR system to the PCM?

• EGR position/flow sensor

• EGR MAP sensor

• EGR IAT

If the EGR passage is plugged what will be the result for the engine?

• increased horsepower

• spark plug fouling

• spark knock

The EGR valve is wide open during engine idle?

• True

• False

What is Normal engine vacuum ?

• 17-18 In/hg

• 17-21 In/hg

• 12-18 In/hg

Rough Idle can be caused by?

• Stuck closed EGR

• Clogged EGR passage

• Stuck open EGR

Spark knock can be caused by all of the following except?

• Clogged EGR passage

• Stuck closed EGR valve

• Stuck open EGR valve

How does EGR prevent spark knock and reduce emissions?

• Lower combustion temps

• Raise Combustion temps

• Adjust air/fuel ratio