Honda Accord Quiz
Fuel and Exhaust Systems

Fuel Pump Pressure Test

In this manual: Fuel and Exhaust Systems
Owner's Manual — 80Maintenance and Adjustments — 43Four-Cylinder Engines — 27V6 Engines — 34Engine General Overhaul and Major Repair — 35Cooling and Heating Systems — 29Fuel and Exhaust Systems — 21Engine Electrical Equipment — 23Engine Control — 315-speed manual transmission (MT) — 74-speed automatic transmission (AT) — 14Clutch and Drive Shafts — 22Brake System — 23Suspension and Steering — 31Body — 41Body Electrical Equipment — 36Electrical Circuit Diagrams — 11
~2min read

PROCEDURE

1. Remove the fuel pulsation damper (see Relieving Fuel System Pressure section) and install the pressure gauge adapter fitting in its place.

2. Не запуская двигатель, включите зажигание. Проследите, чтобы К/В был выключен.

2. Without starting the engine, turn the ignition switch on. Make sure the A/C is off. The fuel pump will run for a couple of seconds; fuel pressure should rise (check the gauge reading) and stabilize.

3. Запустите двигатель и прогрейте его на холостых оборотах до нормальной рабочей

3. Start the engine and warm it up at idle to normal operating temperature. Compare the pressure gauge reading with the Specifications. Now disconnect the vacuum hose from the fuel pressure regulator. The pressure gauge reading should rise immediately, again to the value specified in the Specifications.

4. Если при отсоединении вакуумного шланга давление не повышается, при помощи

4. If the pressure does not rise when the vacuum hose is disconnected, use a hand-operated vacuum pump to apply a vacuum of 305 ÷ 355 mm Hg to the regulator. If the pressure now drops, check the vacuum source for proper operation. Otherwise, replace the regulator.

5. Если результаты измерения давления выходят за пределы допустимого диапазона,

5. If the fuel pressure measurement results are outside the permissible range, perform the following checks:

a) If the pressure is excessively high, check the vacuum supply to the regulator. Vacuum level should change with engine speed. If vacuum is present, check the condition and patency of the fuel return hose/pipe. If the return line is in good condition, replace the regulator.
b) If the pressure is excessively low, replace the fuel filter to eliminate the possibility of clogging. The filter is built into the fuel pump/fuel level sender assembly and is removed together with it (see Fuel Pump Removal and Installation). If replacing the filter does not correct the situation, install a shut-off valve in the line between the regulator and the fuel return line. (Instead of a valve, a length of flexible hose can be installed, which can easily be pinched off with pliers or a clamp.) Start the engine and slowly close the valve or pinch the hose. If the pressure rises above 3.3 kgf/cm², replace the regulator (see Fuel Pressure Regulator Removal and Installation). CAUTION: Do not allow the pressure to rise above 4.2 kgf/cm². Do not pinch the fuel return line itself to avoid the risk of damage.
c) If the pressure remains excessively low even with the return line closed, check the injector(s) for leaks (see Fuel Pipe and Fuel Injector Removal and Installation). Also check the fuel pump for proper operation.

6. After completing the check, relieve the fuel system pressure (see Fuel System Pressure Relief) and disconnect the pressure gauge.

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