Podcast
Questions and Answers
What is a good indicator of a piston ring sealing problem during cranking compression analysis?
What is a good indicator of a piston ring sealing problem during cranking compression analysis?
- High pressure on the first "puff" and consistent pressure build
- Low pressure on the first "puff" and inconsistent pressure build (correct)
- Low pressure on the first "puff" that gradually increases
- Steady rise in pressure with each "puff"
What can cause low compression that doesn't improve with a wet test according to the text?
What can cause low compression that doesn't improve with a wet test according to the text?
- Leaking valves
- A hole in the piston
- A head gasket leak
- All of the above (correct)
When should you suspect a leaking head gasket according to the text?
When should you suspect a leaking head gasket according to the text?
- High compression in two adjacent cylinders
- Steady compression in two adjacent cylinders
- Low compression that improves with the wet test
- Low compression in two adjacent cylinders (correct)
What is the purpose of performing a Cylinder Leakage test as mentioned in the text?
What is the purpose of performing a Cylinder Leakage test as mentioned in the text?
Why is it important for the engine to be warm when conducting a Cylinder Leakage test?
Why is it important for the engine to be warm when conducting a Cylinder Leakage test?
During which stroke does a low pressure get created in the engine?
During which stroke does a low pressure get created in the engine?
What can a poor cylinder seal result in?
What can a poor cylinder seal result in?
What is the effect of abnormal combustion on engine performance?
What is the effect of abnormal combustion on engine performance?
What should be done to avoid personal injury or component damage when conducting cranking compression testing?
What should be done to avoid personal injury or component damage when conducting cranking compression testing?
What happens to the manifold vacuum test results when using newer intake manifold designs?
What happens to the manifold vacuum test results when using newer intake manifold designs?
What is the purpose of cranking the engine through one compression stroke 'puff' when performing cranking compression testing?
What is the purpose of cranking the engine through one compression stroke 'puff' when performing cranking compression testing?
What does the Intake Air Temperature (IAT) Sensor primarily help to adjust?
What does the Intake Air Temperature (IAT) Sensor primarily help to adjust?
How does the Manifold Absolute Pressure (MAP) Sensor respond to changes in applied vacuum?
How does the Manifold Absolute Pressure (MAP) Sensor respond to changes in applied vacuum?
What is the main purpose of the Ignition Reference Signals for the PCM?
What is the main purpose of the Ignition Reference Signals for the PCM?
How does the Vehicle Speed Sensor (VSS) generate a signal that increases with vehicle speed?
How does the Vehicle Speed Sensor (VSS) generate a signal that increases with vehicle speed?
What does the Knock Sensor System signal to the PCM lead to?
What does the Knock Sensor System signal to the PCM lead to?
What is the primary function of the Fuel Tank Pressure Sensor?
What is the primary function of the Fuel Tank Pressure Sensor?
What does the PCV system do?
What does the PCV system do?
What is the main purpose of a catalytic converter?
What is the main purpose of a catalytic converter?
Which component is responsible for providing additional oxygen to the exhaust stream?
Which component is responsible for providing additional oxygen to the exhaust stream?
What is the purpose of ORVR (On-Board Refueling Vapor Recovery)?
What is the purpose of ORVR (On-Board Refueling Vapor Recovery)?
What kind of signal does the automotive computer understand?
What kind of signal does the automotive computer understand?
In Closed Loop operation, what air/fuel ratio is typically maintained based on O2 feedback?
In Closed Loop operation, what air/fuel ratio is typically maintained based on O2 feedback?
What is the primary function of a PROM (Programmable Read Only Memory)?
What is the primary function of a PROM (Programmable Read Only Memory)?
What does EEPROM stand for in the context of automotive computers?
What does EEPROM stand for in the context of automotive computers?
'Baud rate' refers to which aspect of serial data communication?
'Baud rate' refers to which aspect of serial data communication?
'Clear Flood' mode is activated by pressing the accelerator pedal to the floor to achieve what target throttle position?
'Clear Flood' mode is activated by pressing the accelerator pedal to the floor to achieve what target throttle position?
