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New fuel pump,new f/pump relay, no power to fuel pump.

I changed the fuel pump,an fuel pump relay,i get no power to the fuel pump.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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BigBlue77
  • 59 Answers

SOURCE: 1999 chevrolet malibu

The fuel pump relay only energizes for 2 seconds when you turn the key on. It re-energizes once the pcm detects engine rpm. What you are seeing may be the normal operation of the system.

If the vehicle still won't start or the fuel pump dosen't run you will have to trace the wiring from the relay to the pump and check your grounds.

Posted on Aug 26, 2008

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SOURCE: 1996 CADILLAC DEVILLE, NO POWER TO FUEL PUMP

Check for a burned fusible link under the hood. If you have power at the fuel pump relay, you could have a bad ignition switch or bad oil pressure switch...accordianman

Posted on Dec 15, 2008

  • 1 Answer

SOURCE: no power to fuel pump relay

check the realy under the shifter knob..see if all 4 plugs are plugged in.. if not check you EFI fuse(its near the the battery fuse box)..if the fuse is fine then it might be ur ecu

Posted on Feb 09, 2009

  • 366 Answers

SOURCE: fuel pump

probe elect. circuit of pump must be some damaged wires along the way

Posted on Mar 12, 2009

DAD5bbbbg
  • 111 Answers

SOURCE: no power to fuel pump

What you need to do is drop the fuel tank and put a new fuel pump in it. I would drain the gas and put new gas in after you get the pump changed.

Posted on Mar 26, 2009

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why would you change a pump that had no power - cetainly you would figure out the reason for there being no power...
My fuel pump had no power, so I changed it - guess what the new one has no power either... should I try another one or do you think a pump running without power is a little much to ask???

Check the FUSES Check the fuel pump ground lead. Trace the wires from the fusebox to the pump and check for damage or loose connections Have the diagnostic codes scanned if you can not find the problem.

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Have you checked the ASD (Automatic Shut Down) Relay? Check to see if that is getting power. Then check to see if the ASD Relay itself is good. You do not have to use any special tools/knowledge to check this. You can change this Relay out with another Relay that is the same shape and type on a function that is known working. For example: Check to see if your Front Windshield Wipers are working. Change out the ASD Relay with this Front Windshield On/Off Relay. Check the Wipers again. If it does not work, then the ASD Relay is bad. With the Front Wiper Relay in the ASD now check for power to the Fuel Pump Relay.
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Well if theres power going to the relay but not out, then you need a new relay. If theres power in and out of the relay, you might need a new fuel pump. The electric fuel pumps inside the tank are actually lubricated by the fuel as it pumps it, and if it runs dry long enough, it can burn out the pump

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ECM fuse B (20-amp) should provide power at all times to the orange wire of the fuel pump relay. The relay coil receives ground via the black wire, and relay coil gets power from the dark green/white wire. When the relay is closed, you should have battery power on the gray wire. 

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What you need to do is drop the fuel tank and put a new fuel pump in it. I would drain the gas and put new gas in after you get the pump changed.

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