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No power to fuel pump

Relay is good --i can jump power and pump runs

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

keemo68
  • 1263 Answers

SOURCE: 1992 1500 will not start

even though the relay clicked dosn't mean that it's good it could be weak and therefore the gate inside the relay doesn't make a contact to allow the voltage to the pump. i would switch out the relay. quick way to find out for sure is to switch the a/c clutch relay with the fuel pump relay. it should start if it doesn't then you have a loose wire to the pump or a broken wire aor a bad ground. check these out.. please rate this..thanks

Posted on Sep 06, 2008

Molson02536
  • 3854 Answers

SOURCE: fuel pump problems 2003 s10 chev 4.3 v6

Your ECU is what acctivates your fuel pump realy. Put the key on the run possition and pull the ecu fuse for a few seconds and reinstall it ans it should accivate your realy for 5 seconds, Good luck.

Posted on Apr 06, 2009

  • 2 Answers

SOURCE: 98 Astro Van Intermittant Power to Fuel Pump Relay

I've been bitten by this twice! The culprit both times was the connector plug under the van infront of the fuel tank. the second time the connector pin and socket came loose inside the plug itself,( workes for a while then dosen't). Make sure there is good secure contact made in all sockets in this plug, and the pins are held where they need to be inside the plug itself.

Posted on May 29, 2009

  • 9 Answers

SOURCE: 2000 Chevy Express 1500 5.0 has no fuel pressure.

check the fuel pump fuse in the fuse box

Posted on Jan 18, 2010

fixitriteman
  • 431 Answers

SOURCE: my 1998 chevy blazer fuel pump is not running, the

some times even though thy the fuel pump that is is bad you can git one or two more starts out of them by giving the gas tank a good jar-not so hard as to dent it .with key on you should hear the fuel pump start to run .if this is the case you will wont to replace it very soon

Posted on Mar 12, 2010

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2 Answers

2000 durango check fuel pump asd,fuel pump relay,fuel pump fuse all ok, still no power


Sounds like a ground problem to me. Current won't flow without a ground.

Sep 05, 2014 | 2000 Dodge Durango

1 Answer

Whole fuel system


The main fuel pump in a Volvo is really well built and rarely fails (Bosch simply makes great fuel pumps). A good survival trick if you think a main fuel pump might be bad... give it a quick tap with a wrench. For best results, if possible, tap the pump when cranking the engine (while power is going to the pump). If the pump is bad, often the tap will make it come to life and it may stay running until you shut it off. This trick can get you back on the road and get you home in an emergency. If it's a bad fuel pump relay, this will NOT work as there will be no power going to your pump. If this is the case, you might try the below relay bypass "jump" trick to get power going to the pump. TESTING YOUR FUEL PUMP
How to "JUMP" the fuel pump circuit at your Volvo 240 fuse panel:The fastest method to make the main fuel pump run (bypassing the Fuel Pump Relay) is by jumping two circuits at the fuse panel (left side driver's kick panel).

You can make a jumper from a wire with stripped ends or even a straightened paperclip. Jump the circuits on the right side of the fuses for best results
For a 1979-84 240, jump fuse circuit #5 to #7.
For a 1985-93 240, jump fuse circuit #4 to #6.


If the main fuel pump doesn't begin running when jumped (you should definitely hear it humming), you either have a faulty fuel pump or faulty wiring to the pump (bad wiring is really common under an old 240, near the pump). This test of course assumes your battery is good.
If one of the fuses blows during this test, the pump circuit wiring is shorting to ground somewhere between the fuse panel and the pump.

thx



Jan 18, 2012 | 1984 Volvo 240 Series

1 Answer

!988 Jeep Cherokee MPI fuel pressure problem. New everything on/in the fuel system. Can only make it run with a jumper wire from the fuel pump to the battery. Any ideas?


Have you checked the fuel pump relay. If you haven't locate the relay and jump out pins 30 and 87 (there should be a diagram on the relay or if you look at the bottom of it, the pins should be numbered, jump out the corresponding sockets in the relay housing). If the fuel pump turns on when you do that you've verified the power feed is good and the wires to the fuel pump are good. Now with a digital multimeter check that there is battery + on pin 85 or 86. If that checks out, when cranking make sure there is a good ground on the opposite pin (if pin 85 had + on it, pin 86 should have a ground). If all that checks out you can suspect the relay is faulty.

Aug 26, 2010 | Jeep Cherokee Cars & Trucks

1 Answer

Ihave a dodge neon 1996 and i dont have power in the fuel pomp and is new i have a feling is a electric problem all redi chek the relay and is good and if i jump this relay the fuel pom work.


if the relay seems to be fine and all fuse are good, and jumping power to opperate the fuel pump at relay works, then there is a broken wire from the ECU to the fuel pump relay, or the ECU is shot.

Jun 18, 2010 | 1996 Dodge Neon

3 Answers

No power going to the fuel pump?


the crank sensor is most likely the problem. If the PCM does not sense the engine is cranking then the fuel pump will not turn on. Also just because a fuel pump will run does not mean it will pump fuel.. Jump it while its in the fuel tank to see if it will pump. But still when you turn the key on you only have power to the fuel pump for 3 seconds unless you continue to crank. . If you have a 3 second voltage pulse when you cycle the key on, then spray some quick start or brake cleaner. If it now starts and you know the fuel pump has power then the fuel pump needs replacement. If you don't have the 3 second pulse look at the crank sensor as being the problem,

Jun 14, 2010 | 2002 Chevrolet S-10

1 Answer

I have a 2004 Chevy Impala it has poer at the fuel pump fuse and fuse looks good but no power at fuel pump. is there a fuel pump relay switch or what could it be?


First make a set of jumper wires and jump the pump from the battery and see if it works. If it runs its the relay or the ECU,or the ignition switch.
Remove the relay and test it for B+. Then jump the terminals and see if the pump runs. If pump runs and you got B+ up to this point its the relay.
However,if no B+ at the relay means ECU not giving relay the turn on signal..
While wearing a ground wrist strap check out ECU Grounds and B+ wires for continuity from Ignition switch and other areas of interest (use shop manual)
either the switch is not telling ecu to send message to relay to turn on the pump or someone in this circuit has gone bad.

Mar 24, 2010 | 2004 Chevrolet Impala

2 Answers

91 ford ranger...fuel pump will not run pump is good


Maybe you need to test the (pcm) power relay, it controls the fuel pump relay. Once the key is turned on the pcm will initialize the power relay, it in turn will turn on the fuel relay for 2 seconds to prime the fuel rail prior to starting. Since the pump runs continuosly, it means the pcm isnt properly grounding the ckt or the relay is faulty.

Oct 14, 2009 | 1991 Ford Ranger Supercab

2 Answers

1994 buick park avenue . driving home and shut off


how did you jump the fuel pump relay, by bypassing the relay or by applying power to contact that closes the relay? If you bypassed the relay completely you need to b ench test the relay you can do this easily by using any 12v dc power source. If you tested the fuel pump relay by applying power to the relay and the pump run and developed pressure. I suspect a wiring or ground issue. Good luck

Oct 07, 2009 | 1997 Buick Park Avenue

2 Answers

I have no power to the fuel pump unless I jump at the diagnosis under hood. I have 12 volts to the circuit opening relay and with the key turned forward I also have 12 volts to and the leg on the co relay....


fuel pump only runs for 3 seconds or when the engine is running. Cycle key with meter hooked up or ear on gastank.. Listen and watch. for a quick 3 seconds.. The spark your experiencing is most likely your touching a ground connection. If you have 3 seconds of power then you prabably need a fuel pump.

Aug 15, 2009 | Toyota Pickup Cars & Trucks

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