Re: what is the location of the fuel pump relay and...
Behing the ash tray. You are looking for rectangular relay on the left side. The first relay (on the left side) is a window relay. The one behind it is the fuel pump. The one behind it is circular (bulb failure sensor).
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Have you checked the fuel safety cut-off valve/switch located in the trunk. I believe left side behind the carpet The safety cut-off switch will turn off fuel in a collision and sometimes for no reason.
Bad fuel pump will not cause it not to crank, but can cause it not to start. Test with fuel pressure gauge. If it will not crank, entirely different issue=bad solenoid/starter, bad battery connections, bad ignition switch, relay,wiring.
SLOW DOWN THE FUEL PUMP WILL POWER UP BY ECM FOR 15TO20 SEC SO KEY OFF WAIT COUPLE OF MIN NOW HAVE SOME ONE DO KEY ON ONLY.YOU LISEN TO PUMP.IF NO PUMP NOISE. YOU NEED TO RECHECK YOUR WIRING THAT CAME WITH NEW PUMP IF WIRING IS GOOD RETEST BUT CHECK POWER AND GROUNG IF POWER AND GROUND ARE GOOD. BAD PUMP OR WIRING WRONG.RELAY BOX HAS RELAY AND FUSE FRONT OF TRUCK
With the ignition key turned on without trying to start the engine you should hear the fuel pump run for a few seconds. That is how its primed to start. Upon starting the oil pressure reaches normal operations & the prime switch will cut off by the signal from the computer. Thus the engine still needs fuel to run so the computer switches on the fuel pump relay to provide the fuel to the engine. The prime switch is intergrated with the oil pressure switch. If you do not hear the fuel pump upon having the key on replace the oil pressure sensor
there is no fuel pump cut off switch . put a fuel pressure gauge on the fuel rail schrader valve turn key on you should have 40+ pounds of pressure if you dont the pump is not working open the relay center under the hood swap the fuel pump relay with the wiper relay and try again if no pressure its not the relay its the fuel pump if you do have fuel pressure that means the relay was bad get a new one the car should start if you do have pressure and the car wont start the injector circuit is dead and what causes this is the crank sensor located on top of transmission bellhousing on driver side auto parts store 38.00 dealer 170.00 when you change it make sure to push it in and hold it while you tighten the bolt hope this helps and please dont forget to rate my solution
The fuel pump relay is located in the Power Distribution Center (PDC) under the hood. The inside top of the PDC cover has a label showing relay and fuse location. The relay supplies battery voltage to the fuel pump. A buss bar in the Power Distribution Center (PDC) supplies voltage to the solenoid side and contact side of the relay. The PCM controls the fuel pump relay by switching the ground path for the solenoid side of the relay on and off. The PCM turns the ground path off when the ignition switch is in the Off position. When the ignition switch is in the On position, the PCM energizes the fuel pump. If the crankshaft position sensor does not detect engine rotation, the PCM de-energizes the relay after approximately one second.
i gather this is diesel engine.
the fuel cut solenoid is on the rear of the injector pump (left side of engine) there were a couple of different injector pumps some had 2 solenoids on pump but one is fuel cut solenoid.
can be purchashed from dealer,diesel injection service centres and several different spare parts outlets.
Try checking fuel pressure again with a guage on the fuel rail. If you still notice the pressure is low and you know the fuel pump is good, the fuel pressure regulator may be bad. Sometimes you can tell by unplugging the vacuum hose from it and if you see gas that means the diaphram is leaking. If everything checks out with the fuel system a bad EGR valve or EGR valve solenoid can cause cars to sort of stall under half throttle. Good luck and keep me posted. If you found this helpful please rate this solution.