Question 145Motor Plants - 1st Asst/Chief
70% to passWhich of the following problems is the main source of fuel pump and injection system malfunctions?
ACoated fuel lines
BImproper lubrication
CAir in the fuel system
DExcessive vibration
AI Explanation
The correct answer is C) Air in the fuel system. Air in the fuel system is the main source of fuel pump and injection system malfunctions. Air in the fuel can cause the fuel pump to cavitate, leading to reduced fuel pressure and flow. This can result in misfiring, loss of power, and eventual damage to the fuel pump and injection components. In contrast, coated fuel lines, improper lubrication, and excessive vibration, while potentially contributing factors, are not the primary source of these types of malfunctions.
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