Where is an additional high-pressure fuel filter installed?

• A. Between the fuel tank and the pump
• B. In the engine intake manifold
• C. After the injectors
• D. Between the fuel pump and the fuel control

Answer: (D)

The high-pressure filter is placed to protect the fuel metering and injection components from any contaminants that could cause wear, clogging, or improper spray under high pressure. Installing it between the fuel pump and the fuel control puts clean fuel right before the critical metering device and injectors, ensuring the high-pressure side stays clean and reliable. Putting a filter between the tank and the pump would filter at low pressure, which is important but doesn’t guard the high-pressure path as effectively. Filtering after the injectors wouldn’t shield the high-pressure components and isn’t how the system prioritizes protection. An intake-manifold location wouldn’t filter fuel at all, since that area is for air.