Corolla Wagon L4-107.5 1762cc 1.8L DOHC (7A-FE) (1993)
- If pressure is high, replace the fuel pressure regulator.
- If pressure is low, check the following parts:
^ Fuel hoses and connections
^ Fuel pump
^ Fuel filter
^ Fuel pressure regulator
- Remove jumper wire.
Checking Fuel Pressure - No Vacuum To Regulator
- Start the engine.
- Disconnect the vacuum sensing hose from the fuel pressure regulator.
- Measure the fuel pressure at idle.
Fuel pressure:
265 - 304 kPa (2.7 - 3.1 kgf/cm2, 38 - 44 psi)
Checking Fuel Pressure - Vacuum To Regulator
- Reconnect the vacuum sensing hose to the fuel pressure regulator, and plug the hose end.
- Measure the fuel pressure at idle.
Fuel pressure:
206 - 255 kPa (2.1 - 2.6 kgflcm2, 31 - 37 psi)
- If pressure is not as specified, check the vacuum sensing hose and fuel pressure regulator.
- Stop the engine. Check that the fuel pressure remains 147 kPa (1.5 kgf/cm2, 21 psi) or more for 5 minutes after the engine is turned off.
- If pressure is not as specified, check the fuel pump, pressure regulator and/or injector.
- After checking fuel pressure, disconnect the battery negative (-) cable and carefully remove gauge to prevent gasoline from splashing.