Question about Kyosan Fuel Pressure Regulator 1993-1994 Lexus SC400 Fuel Pressure Regulator, 93-94 Lexus SC400 Kyos

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What is the problem with my lexus sc 400 no signal coming out ecm to fuel pump relay

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Toyota products usually don't use a shut-off for the fuel system.
If the fuel pressure is low, you would need to check the fuel pump relay for power and then the pump.

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Lost power to fuel pump

the oil pressure sensor has a 3rd wire which feeds to the fuel pump .. If you turn the ignition key on and do not hear the fuel pump running for 5 seconds, replace that oil pressure sensor. That sensor does turn the fuel pump circuit off once oil pressure is acheive and the the computer switches the fuel pum relay on to take over running the fuel pump

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Where is the fuel pump relay on a 1993 lexus 400


The fuel pump relay is located at the front right inner area of the engine compartment just past the strut tower. it should be in a box by itself labelled fp relay.

Have a nice day!!!

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