2001 Hyundai Accent GL Fuel Pump Test

 2001 Hyundai Accent GL Fuel Pump Test

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Turn ignition off. Apply battery voltage to fuel pump check connector terminal. See Fig. 1 . Remove fuel tank cap and listen for fuel pump operation. Pinch fuel hoses by hand, and ensure fuel pressure can be felt. FUEL PRESSURE TEST Accent & Elantra NOTE: Fuel pressure regulator is an integral part of fuel pump and is not serviced separately. 1. Release fuel pressure. See FUEL PRESSURE RELEASE . Disconnect high-pressure fuel hose from fuel delivery pipe. Cover hose connection using rags to avoid spraying of fuel. 2. Using Fuel Pressure Gauge Adapter (09353-38000), install fuel pressure gauge to fuel delivery pipe. See Fig. 2 . Tighten fuel gauge adapter bolts to 18-26 ft. lbs. (24-35 N.m).

Connect negative battery cable. 3. Using fuel pump check connector terminal, activate fuel pump and ensure no fuel leakage is present at pressure gauge or connection. See FUEL PUMP TEST . If no leaks are present, start engine and allow to idle. 4. Measure and record fuel pressure at idle. See REGULATED FUEL PRESSURE (AT IDLE) table. If measurements are not within specification, go to next step. If fuel pressure is as specified, go to step 7 . 5. If fuel pressure is less than specified, check for restricted fuel filter. Check for fuel leak on return side, caused by poor seating of fuel pressure regulator. Replace fuel filter or fuel pump assembly as necessary. 6. If fuel pressure is greater than specified, check for sticking fuel pressure regulator. Check for restricted or bent fuel return hose or pipe. Repair or replace fuel hose, pipe or fuel pump assembly as necessary.

7. If fuel pressures are as specified, stop engine and check gauge for decrease in fuel pressure. Fuel pressure should hold for approximately 5 minutes. If fuel pressure does not hold for approximately 5 minutes go to next step. 8. If fuel pressure decreases slowly after engine is stopped, check for leaking injector. If fuel pressure decreases immediately after engine is stopped, fuel pump check valve is not working. Replace fuel injector or fuel pump as necessary. After repairs are completed, recheck fuel pressure. 9. After testing is completed, release fuel pressure. See FUEL PRESSURE RELEASE . Disconnect fuel pressure gauge from adapter. Ensure hose connection is covered by shop towel to prevent fuel spray. Remove adapter bolts and adapter, install NEW “O” ring, and reinstall fuel line with original bolts. Apply battery voltage to fuel pump check connector terminal. See Fig. 1 . Check for fuel leaks.