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It's fuel pressure regulator .
The fuel pressure regulator attaches to the fuel module assembly. The fuel pressure regulator, located in the fuel tank, is attached to the fuel sender assembly. The fuel pressure regulator keeps the fuel available to the fuel injectors at a regulated pressure
i fyou look at the fuel rail (fuel pipes that connect all the fuel injectors) you will see a small round piece with a vaccuum hose attached, thats the fuel pressure regulator. once you find it, you will see how it comes off.
Are you sure that the fuel pump is properly installed? Have you tested the fuel pump circuits to see if they are working properly? Did you also replace your fuel filter? (It could be totally clogged up) Have you checked to see if there is any fuel pressure at the fuel rail or are you just assuming that the pump is not delivering fuel to the injectors? Have you checked your fuel injector circuits for power and for injector pulse from the EngineControl Module? Have you scanned your Engine Control module to see if you possibly have a Crank Sensor or Cam Sensor problem?
The oil pressure switch only keeps the fuel pump running once the engine starts. The fuel pump should run for 2-3 seconds when you turn the ignition switch to the "Run" position to prime the injectors. The oil pressure switch is the problem only if the engine will not continue to run on its own after it starts up.
FUEL PRESSURE REGULATOR IS ON FUEL RAIL WITH THE FUEL INJECTORS.THE FUEL PRESSURE REGULATOR ALSO HAS A VACUUM LINE GOING TO IT.THE FUEL INJECTORS AND FUEL PRESSURE REGULATOR IS UNDER THE INTAKE COVER.
A fuel pressure test should be performed as I suspect the fuel pressure regulator is leaking fuel into the vacuum line causing the engine to flood on restart.
A drop in fuel pressure would confirm this.
Fuel pressure regulator is located on the fuel rail. 1. Remove top engine covers and fuel rail mounting bolts. 2. Disconnect vacuum hose. 3. Remove regulator clamp, noting position of regulator. 4. Pull regulator out with shop towel (full of fuel) don't lose thrust washer behind. 5. Replace with new O-rings.
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