Question about Ford Ranger

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Solenoid was bad replaced it fuel relay was making a bad vibrating noise replaced that truck will turn over but now cant her fuel pump running will not start up

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  • sunnyboyjim2 Aug 06, 2008

    fuel pump cuts in and out. Can move the wiring harness by the radiator and fuel pump will start. Is there a relay or solenoid which could cause this?

  • LiLrat468
    LiLrat468 Dec 14, 2008

    Relay inside the CCRM buzzes and fuelpump doesn't come on. Checked the cutoff switch and is fine. Plugged Scan Tool in and fuelpump comes on and car starts. Unplug Scan Tool and car dies instantly. Not like loss of fuel, but like lose of spark.

  • Anonymous Mar 13, 2014

    Truck turns over. Replaced fuel pump. reset crash solenoid. checked fuse ok. still don't start

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  • Master
  • 335 Answers

Check the fuel pump cut off switch located behind the carpet on the passenger side up unde the heater box, pull the carpet back and see if the button on top of the switch is pressed down, if not there behind the panel passenger footwell right side same thing also make sure the switch has power coming in and going out. BUT! you gotta be quick the fuel pump relay controls this power and only suppllies power for 2-3 seconds then it turns off. so plan ahead get your test equipment all set-up and surn the ignition on if you have power great turn off the key and move test stuff to tho other wire on the fuel shut off switch get ready and turn on the key power good no power bad fuel pump switch but No power to the switch likely a bad ffuel pump relay.

Posted on Aug 03, 2008

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1 Answer

96 windstar eec wiring scematic


Find another relay with an identical part number(maybe the fuel pump relay)& swap it in place of the suspect EEC relay.See if the buzzing quits.If it does,the EEC relay is bad.There might be a ac WOT cutout relay or fan relay with an identical part number that you can use instead of the fuel pump relay.The fuel pump relay & EEC relay will both have to be in place in order for the engine to start.A relay should click when you turn the key on,but it shouldn't make a buzzing noise.BTW-the EEC relay is energized when you turn the key on and then it supplies ignition on power to the computer,injectors,solenoids and fuel pump relay.Therefore, if the EEC relay is defective, these components are Not going to work.If you don't hear the fuel pump prime when the key is first turned on,that's a sign the EEC relay is bad.One of the injector wires should have battery voltage, if the EEC relay is powering up.If your vehicle doesn't have a matching relay to the EEC relay(except for the fuel pump relay)just pull the FP relay out and slide it into place of the suspect EEC relay for testing purposes.If the buzzing noise stops,then replace the relay because there's no way to test if the car will start without having both relays in place.

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Where is the location of the fuel pump relay switch in a 1999 gmc sonoma


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2 Answers

Came home last night, all was fine, came out today, won't start...turns over, hit with ether, starts... not getting fuel


Hello Trio1.

First item to check is the fuel pressure. (is it cold where you are?, could have a frozen fuel line?)
Open the fuel filler cap and listen while someone turns the key to the on position. There should be a couple seconds of humming noise when the fuel pump runs. If no noise is heard the fuel pump or the wiring to it is bad.
Here's a quick hint and it often works if the fuel pump is the issue. While someone is cranking the engine over with the starter, hit the bottom of the fuel tank with a baseball bat or something similar. Not too hard! Just enough to vibrate the fuel pump into making contact on the armature motor brushes.
If this gets the car running it's only very temporary, you will need to replace the fuel pump. I guarantee it will happen again, only you may not be so fortunate the next time.

If you do hear the fuel pump run you will need to check that it is developing pressure.
On the fuel rail where the fuel injectors are on the intake manifold the is a fitting where a fuel pressure tester is attached to. There should be 50 to 60 PSI when the key is turned on. If low on pressure you will need a new pump.
A partially plugged fuel filter is hard on fuel pumps, it does make them work hard. Replace it too.
If your fuel pressure is OK then you will need to find out if your fuel injectors are firing.
If you need help with those, let me know here, I doubt we will need to get that far, but just in case.

Thank you for using FixYa.

KL

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1 Answer

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We just got a brand new battery and starter(i know the solenoid is on the starter) for our 98 windstar. 3 weeks later we got an oil&filter change,as well as fuel filter&fuel injection cleaning, and...


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1 Answer

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1 Answer

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