MR2 L4-132 2164cc 2.2L DOHC (5S-FE) (1993)
Reading Fuel Pressure
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Turn the ignition switch ON.
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Measure the fuel pressure.
Fuel pressure: 265 - 304 kPa (38 - 44 psi)
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If pressure is high, replace the fuel pressure regulator.
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If pressure is low, check the following parts:
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Fuel hoses and connections
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Fuel pump
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Fuel filter
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Fuel pressure regulator
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Remove jumper wire.
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Start the engine.
Reading Fuel Pressure - No Vacuum To Regulator
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Disconnect the vacuum sensing hose from the air intake chamber and plug the air intake chamber outlet.
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Measure the fuel pressure at idle.
Fuel pressure: 265 - 304 kPa (38 - 44 psi)
Reading Fuel Pressure - Vacuum To Regulator
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Reconnect the vacuum sensing hose to the air intake chamber.
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Measure the fuel pressure at idle.
Fuel pressure: 206 - 255 kPa (31 - 37 psi)
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If pressure is not as specified, check the vacuum sensing hose and fuel pressure regulator.
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Stop the engine.
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Check the fuel pressure 5 minutes after the engine is turned off.