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April Quiz
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A compression test shows that one cylinder is too low. A leak test
on that cylinder shows excessive leakage. During the test, air could
be heard coming from the tail pipe. Which of the following could
be the cause?
A. Broken piston rings C. Leaking intake valve B. Leaking head
gasket D. Exhaust valve not seating
Answer: The correct answer is D, exhaust valve not seating.
If an exhaust valve is not seated, a leak test will force air past
the valve and out the tail pipe. A leaking intake valve will allow
air into the intake manifold and out the throttle body. Head gasket
or ring leaks will allow air into the cooling system or crankcase.
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Nov Quiz
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Oct Quiz
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Sept Quiz
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On which type of car must you ALWAYS Remove
the key from the ignition before working on it - Even if the car
is not running?
Answer
The Ford Hybrid - NOTE:
Failure to do so may result in serious injury or loss of life!
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When using an NGS: Which card will give you
all of the OBD II readings on other brands of car.
Answer
The Green Card
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When using Mode 6 - name two
things that can cause a TID or CID status to report a failing status.
Answer
1. Certain monitors may not be
installed on the vehicle - such as a heated catalyst monitor
2. Also certain components will
need to have the engne running in order for them to report a passing
status.
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Feb Quiz
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Jan Quiz
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Tech Quiz
Questions
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What's the voltage of a half charged battery?
Answer 12.4 volts
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On OBD II Retest - Which Monitor
Must Run?
Answer: The CAT
Converter
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Dec
Quiz
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Nov
Quiz
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Oct
Quiz
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Name A Few Symptoms of EVAP Problems
- Hesitation
- Sag
- Stumble
- Surge
- Spark Knock
- Detonation
- Runs Rough
- Unstable, Erratic Idle
- Stalling
- Poor Fuel Economy
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Name two problems
that may cause the new ignitions to fail to start.
Bonus Question: What is the approx cost of a replacement "Smart
Key"
- Dirty Keys (clean key to fix)
- Too many keys on ring (too much weight)
Bonus Answer approx $100/key
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Name 6 aspects of
the Cooling System that can affect NOX:
• Thermostat Operation
• Antifreeze Mix
• Fans
• Air in System
• Head Gasket Concerns
• Pressure Cap
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