Fuel Pressure (Fuel System): Corolla
- Ensure battery is fully charged. Release fuel pressure. See FUEL PRESSURE RELEASE under FUEL SYSTEM. Disconnect negative battery cable.
- Purchase fuel pipe Part No. (23901-22010) from parts department. Remove fuel pipe connector from end of NEW fuel pipe. See Fig 1.
- Remove fuel pipe clamp from end of fuel pipe at end of fuel rail. Perform STEP 1. See Fig 2. Ensure area around fuel pipe and disconnect fitting is clean.CAUTION: Use care when disconnecting fuel pipe, as some residual fuel pressure may still exist in the fuel system.
- Depress both sides of retainer and pull fuel pipe with disconnect fitting from fuel pipe fitting. Perform STEP 2. See Fig 2.
- Install adapter, hose and fuel pressure gauge from Fuel Pressure Gauge Set (SST 09268-45012) with fuel pipe connector between fuel pipe and fuel pipe fitting. See Fig 3. Ensure hose, fuel pipe and fuel pipe connector are properly connected.
- Install negative battery cable. Connect scan tool to data link connector No. 3. See Figure-8. Turn ignition on. DO NOT start engine.
- Turn scan tool on. Select ACTIVE TEST MODE on scan tool. Using scan tool manufacturer's instructions, activate fuel pump and note fuel pressure. Fuel pressure should be 44-50 psi (3.1-3.5 kg/cm2
).NOTE: Fuel pump may also be activated by connecting battery voltage to specified terminals on fuel pump. See Figure-16.
- If fuel pressure is within specification, go to next step. If fuel pressure exceeds specification, replace fuel pressure regulator mounted on fuel pump in the fuel tank. See REMOVE/INSTALL/OVERHAUL article. If fuel pressure is less than specified, check for leaking fuel hoses or connections, restricted fuel filter, defective fuel pump or defective fuel pressure regulator.
- Turn ignition off. Remove scan tool from data link connector No. 3. Start engine and allow engine to idle. Note fuel pressure with engine idling. Fuel pressure should be 44-50 psi (3.1-3.5 kg/cm2 ).
- Shut engine off and note fuel pressure. Fuel pressure should remain at least 21 psi (1.5 kg/cm2 ) for a minimum of 5 minutes. If fuel pressure is within specification and holds as specified, go to next step. If fuel pressure is not within specification or does not hold as specified, check for defective fuel pump, fuel injector or fuel pressure regulator.
- Release fuel pressure. Disconnect negative battery cable. Remove adapter, hose, fuel pressure gauge and fuel pipe connector.CAUTION: DO NOT reuse old retainer when installing fuel pipe on fuel pipe fitting. Always use a NEW retainer.
- Apply light coat of engine oil on tip of fuel pipe fitting to allow for ease of disconnect fitting and fuel pipe installation. Using NEW retainer, install fuel pipe on fuel pipe fitting until "click" sound is heard. DO NOT reuse the old retainer. Pull on fuel pipe to ensure fuel pipe is properly locked on the fuel pipe fitting.
- Reinstall fuel pipe clamp. Install negative battery cable. Check for fuel leaks by using scan tool to energize fuel pump.