Question about 1991 Ford Explorer

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99explorer no start at times has new fuel pump and relay

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Any check engine light or codes blinking. No. Change gas station, put in a good fuel treatment to clean up your plugs and sensors. Or get a can of seafoam and inject into vehicle combustion as instructed.. Use premium.

Posted on Nov 27, 2013

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 2 Answers

SOURCE: where is the fuel injection relay on 2.9L

under the hood or under the dash in a br2

Posted on Oct 11, 2008

  • 1 Answer

SOURCE: have ford f 150 302

i got a 6 cylinder ford truck when i drive it with the first tank it loose power. then i push the second tank and it runs normal .

Posted on Feb 12, 2010

  • 381 Answers

SOURCE: Egine turns over fine, but the fuel pump does not

fuel pump itself is most likely going bad.

Posted on Nov 28, 2010

airjer995
  • 5332 Answers

SOURCE: 1994 ford explorer, new fuel pump,new fuel pump relay,no power to fuel pump

Have you checked the fuel ppm cut off switch? It should be under the passenger side of the dash. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!

Posted on Feb 21, 2012

timmcbeth198
  • 12 Answers

SOURCE: no gas or spark

Try your inertia switch in the cargo area in back. Its located on the passenger side rear wheel well. Push the button.
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Posted on Feb 27, 2012

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We have replaced fuel pump in a 98 ego metro LSi drove home ran fine. Now it won't start any ideas why it won't start.


Pam, was the fuel filter replaced at the same time that the fuel pump was replaced? If not, replace the fuel filter. Often, the filter will get clogged with debris. When that happens, the fuel pump will be ruined. Replacing the pump without replacing the fuel filter can ruin the new pump. It is also possible that your new fuel pump is defective. Now that most replacement parts are made in China and the third world, there is virtually NO quality control. I'm a professional mechanic and defective brand new parts are a BIG problem in this industry. Was the fuel pump relay replaced when the new fuel pump was installed? Always install a new relay, as a failing [your old] fuel pump will often damage the relay. This will cause problems with the new fuel pump. I would advise that you install a fuel pressure test gauge to the engine. This will allow you verify whether or not the engine is receiving enough fuel pressure. If the pump works but the pressure is low, also check the fuel pressure regulator. The web links below should help you.


How to Check for Fuel Delivery in Geo Metro eHow

FYI, there is also a "sock" style pre-filter on the fuel pump. This also needs to be replaced any time that you replace the fuel pump.

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2000 mercury grand marquis 4.6 fuel


Voltage drop test the electrical circuit , do know how to do automotive electrical testing . Lose connection , resistance in the circuit , lose ground Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia Testing Electric Fuel Pump Problems with Voltage Drop Test

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2000 mercury grand marquis 4.6 Intermittent problem. 35,000. miles. Problem engine died several times wile driving. Also after car is parked from a drive will not start. Found that the fuel pump is not...


I'd have to test when problem is ongoing. When you first turn on key, no crank, you should hear the pump run for a few seconds then stop. For initial prime, the computer doesn't need rpm signal. Engine cranking, the computer needs to see rpm signal or it won't ground the fuel pump relay. W/o rpm signal, no spark at the plugs and no fuel injector pulse. I know your talking about fuel, but, when problem is ongoing, check spark and fuel injector pulse, engine cranking.
Intermittent problems are a pain, have to test when problem is ongoing.
mercury fuel pump-i4kx0gxqalhdz4ok10irisui-5-0.jpg

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Not guessing as to what the problem is , testing for voltage drop problems with a volt meter . posted a video on youtube yesterday . If your still looking for guesses forget it , no one on here could say for sure without testing the circuit an hooking up a scan tool to see if PCM is energizing the relay . Do yourself a favor an take it to a qualified repair shop . Fuel Pump Electrical Circuits Description and Operation If you can't learn how to test from this guy , better take to a repair shop .

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1 Answer

Fuel pump not running. pump is new and i replaced the main relay


Bring the relay back into view and tap it with a screwdriver or something while you try to start it at the same time. If it starts you have another bad relay.

May 23, 2010 | 1991 Honda Accord

2 Answers

It will not start. We changed the fuel pump three times. Each time the new fuel pump will not hum or buzz when you turn the igntion.


Did you check the fuel pump wiring harness, fuel pump ground , power to the fuel pump, fuel pump fuse , fuel pump relay

Oct 18, 2009 | 1999 Chevrolet Venture

1 Answer

Car won't start


k is there power to fuel pump? yes,,, check grounds..... NO check relay only get kia relays for main and fuelpump since o2s run on the same relay,..... if relay is good suspect comp.... mine has same problem with no power to fuel pump i have now traced problem to ecu sux but at least it has a new fuel pump and relay lol.....

Jan 31, 2009 | 2000 Kia Sportage

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