Author Question: A cylinder power balance test is performed. Cylinders 1, 2, and 3, all drop 175 RPM when disabled ... (Read 114 times)

melina_rosy · **on:** Jun 23, 2018

A cylinder power balance test is performed. Cylinders 1, 2, and 3, all drop 175 RPM when disabled with a scan tool. Cylinder 4 drops 50 RPM when disabled. The following statements are all correct EXCEPT ________.

A) There may be a mechanical problem with cylinder 4
B) Cylinder 4 is much weaker than 1, 2, and 3
C) This test could also be conducted by grounding the plug wire for each cylinder
D) Cylinder 4 is much stronger than 1, 2, and 3

Question 2

What is NOT true about short-term fuel trim?

A) Is expressed in percentages. B) Uses the oxygen sensor.
C) Able to react quickly to add or subtract fuel. D) Can add or subtract a large amount of fuel.