ASE T1 GASOLINE ENGINES| Study Questions with 100% Correct Verified Answers
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Course
ASE
Institution
ASE
What are some issues that can cause a Zero on a cranking vacuum
test? A. Improperly adjusted throttle blade
B. A loose or cracked carburetor or intake throttle body
C. A leaking intake manifold gasket - ANSWER All of the above
ASE T1 GASOLINE ENGINES| Study
Questions with 100% Correct Verified
Answers
What are some issues that can cause a Zero on a cranking vacuum
test? A. Improperly adjusted throttle blade
B. A loose or cracked carburetor or intake throttle body
C. A leaking intake manifold gasket - ANSWER All of the above
Zero cranking vacuum and no-start or hard-start complaints can also be caused
by a severe ___ restriction.
A. Intake
B. Exhaust - ANSWER B. Exhaust
During a manifold vacuum test, with the EGR plugged and the RPMs at 2500, the
reading should be what compared to the engine at idle?
A. Equal
B. Equal or greater
C. Equal or less - ANSWER B. Equal or greater
During a manifold vacuum test, with the EGR plugged and the RPMs at 2500
what Weil cause the drop in pressure?
A. Exhaust restriction
B. Intake restriction
C. Plugged air filter - ANSWER A. Exhaust restriction
, When the idle vacuum reading is low but steady what is the first suspect?
A. Air leaks
B. Exhaust restriction
C. Vacuum leaks - ANSWER A. Air leaks
And
C. Vacuum leaks
If you artificiality enrich the air mixture to the correct amount on an engine
with air leaks, what will happen?
A. Slow down and have rougher idle
B. Speed up and then smooth out
C. Speed up and then slow down beyond original speed - ANSWER B. Speed
up and then smooth out
Leaking valves will show what during a vacuum test?
A. Regularly raises to much higher than normal reading
B. Intermittently drops to lower than normal reading
C. Regularly drips to lower than normal reading - ANSWER C. Regularly drips to
lower than normal reading
During a manifold test, you notice a substantial but intermittent drop what would
you suspect?
A. Worn valve guides
B. Burnt valve or improper valve clearance
C. Sticking valve - ANSWER C. Sticking valve
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