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No power to fuel pump

Replaced pump and pump relay still nothing

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  • Cars & Trucks Master
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Year make and model ?

Posted on Apr 21, 2013

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Posted on Jan 02, 2017

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GM Elec
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SOURCE: 92 Chevy Suburban Electrical Fuel System

I assume the fuel pump fuse is good?
The only time voltage will be sent to the fuel pump will be the first 2 to 3 seconds if the starter is not engaged. You will want to crank the engine over and check for voltage on the load side of the relay, circuit #30 at the relay.
Let me know after you check.
Regards,

Posted on Feb 23, 2009

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SOURCE: 1999 oldsmobile silhouette van won't start. no power to fuel pump

I have a silhouette and it had the same problem
Follow the fuel pump wiring harness to where it plugs into the floor of the van--pull the connectors apart--they will probably be corroded, and you will possibly have to change both wiring harnesses or connectors.

Posted on May 25, 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

  • 20 Answers

SOURCE: 92 chevy astro van fuel pump and relay

Injectors or Carb? is there fuel presurt to the line near the engine and what is the presure.
The mechanoc was it a shop or buddy at home? Can you hear the fuel pump run when the key is turned on?

Posted on Jun 02, 2009

  • 1 Answer

SOURCE: no spark no fuel no start! replaced and checked

funny thing is I have a 2002 GTI with the exact same problem. have spent the last three days at work trying to figure things out.. best of luckn email me if you figure anything out. Beattie411@gmail.com

Posted on Mar 19, 2010

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Fuel shutoff. for or 20002 dodge stratus location emergency.


I just looked at a wiring diagram of the fuel controls for this model: there is no fuel shut-off switch in the wiring. It's pretty straight forward, typical fuel pump controls: the fuel pump relay is in the under-hood power distribution center. When this relay is turned on, power is sent to the fuel pump, nothing else is in the path of the hot wire to the pump module so it (the pump) should be working.

So if pump is not on, you can diagnose the wiring right here at the fuel pump relay. First you verify the power feed for the pump is available at the relay. (One terminal at the relay will have battery voltage with key off. If you pull the relay out and use a test light, one terminal position will be hot.) Next you verify the relay is working, sending power to the fuel pump in the gas tank. You do this by having someone cycle the key to on, while you hold a finger on the relay (it's back in place) to feel it click on. You should feel it, maybe even hear it, the relay will energize every time the key is turned to on, and this is what sends power to the fuel pump.` If it all works, and the pump is not on, the pump probably needs replacing. If the pump relay is not clicking on, that's a wiring hassle, including the wire to the engine computer. The pcm is what controls the relay turning on.
Do you know if the fuel pump has ever been replaced in the car? If it is original, it has been a good long run.

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Have you tested the pump relay to see if it is sending power to the fuel pump ?

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If you have no fuel pressure at the engine when key is on, the pump is not coming on. Check fuel pump fuse, check fuel pump relay (relay should click when key turned to on-put finger lightly on it and feel for click when someone turns key to on). If no click, signal from computer may be lost, ground for relay may be lost, or relay may be bad. If it clicks, wiring from relay to pump may have failed, or the relay's main power source may not be there at relay-find the fuse link or maxi-fuse that powers that relay. One terminal at relay should be hot at all times-can check for that with a test light.
If pump is working and you do have fuel pressure, you will need to check injector circuit. Post back if questions, or need further help.

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PROBLEM COULD BE FUEL PUMP WIRING TO FUEL PUMP.OR FUEL PUMP ITSELF FAULTY.TRY ANOTHER FUEL PUMP RELAY BECAUSE POWER COULD BE AT RELAY BUT IF RELAY DONT CLOSE FUEL PUMP WONT WORK.

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1990 ford festiva no power to fuel pump. replaced relays , fuel pump, checked safety shutoff. nothing .. ran hot wire to fuel pump and pump worked but car still not trying to start. got spark. now what


The pump should have a fuse in the fuse block. You need to check for power in the fuse block and you need to check power to the pump relay.

Sometimes there is a fusible link to the Relay. If you check the connector terminals for power where the Relay plugs in, you can determine if the fusible link has blown. You could have already replaced the bad parts and now need to restore power to the Relay.

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First check any ignition/fuel related fuses. Check to make sure you have 12 volts coming into the pump and coil. If nothing to the fuel pump replace the fuel pump relay - if you do have power to the fuel pump then replace the pump. If nothing is coming to the coil it is either an ignition relay or a wiring issue. If you have 12 volts to the coil but no spark then replace the coil.
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have you checked all fuses under the hood? have you checked the fuel pump relay? you may be able to swap the fuel pump relay with amother relay in the fuse box.are you getting power into and out of the reset switch? from there it goes to the fuel pump. if power is getting to the fuel pump and it has a good ground, the the pump is bad.

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