2. Technician A says the heater circuit in an
oxygen senser is meant to bring this senser to
operating temperature sooner. Technician B
says the oxygen senser senses the oxygen in
the exhaust when it is in closed loop. Who's
correct?
oxygen senser is meant to bring this senser to
operating temperature sooner. Technician B
says the oxygen senser senses the oxygen in
the exhaust when it is in closed loop. Who's
correct?
3. Technician A says a stuck closed EGR valve
will cause an engine to stumble or stall.
Technician B says a open EGR valve will cause
an engine to ping. Who's correct?
will cause an engine to stumble or stall.
Technician B says a open EGR valve will cause
an engine to ping. Who's correct?
4. Technician A says the Manifold Absolute
Pressure senser senses pressure in the intake
manifold.Technician B says the Mass Air Flow
Sensor senses air volume in the air tube to
indicate engine load. Who's correct?
Pressure senser senses pressure in the intake
manifold.Technician B says the Mass Air Flow
Sensor senses air volume in the air tube to
indicate engine load. Who's correct?
5. Technician A says an Air / Fuel Sensor is
designed to reach and keep a vehicle at
Stoichiometry. Technician B says Stoichiometry
is 15.7:1 air to fuel mixture. Who's correct?
designed to reach and keep a vehicle at
Stoichiometry. Technician B says Stoichiometry
is 15.7:1 air to fuel mixture. Who's correct?
6. Technician A says a stuck open PCV valve will
cause a lean condition. Technician B says the PCV
system removes blowby gases from the crankcase.
Who' s Correct?
cause a lean condition. Technician B says the PCV
system removes blowby gases from the crankcase.
Who' s Correct?
7. Technician A says the crankshaft position
sensor monitors the crankshafts speed and
rotation. Technician B says a Permanent Magnet
Sensor has three wires. Who's correct?
sensor monitors the crankshafts speed and
rotation. Technician B says a Permanent Magnet
Sensor has three wires. Who's correct?
8. Technician A says that the Evaporative Purge
Valve releases fuel vapor to the intake manifold
instead of the atmosphere. Technician B says an
Evaporative Pressure Sensor is used to notify the
PCM of gas tank pressure. Who's correct?
Valve releases fuel vapor to the intake manifold
instead of the atmosphere. Technician B says an
Evaporative Pressure Sensor is used to notify the
PCM of gas tank pressure. Who's correct?
9. There is black smoke coming from the tailpipe
of a vehicle. The most likely to cause this condition
is:
of a vehicle. The most likely to cause this condition
is:
10. An oxygen sensor has a voltage reading of .20
volts. Technician A says this indicates a rich fuel
mixture. Technician B says .45 is 14.7:1 or
Stoichiometry. Who's correct?
volts. Technician A says this indicates a rich fuel
mixture. Technician B says .45 is 14.7:1 or
Stoichiometry. Who's correct?
| A-8 Engine Performance Sample Test |
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1. Which is the least likely to cause a vehicle to
have a rich fuel condition:
have a rich fuel condition: