1995 Ford Explorer Wont Start

Fuel pump relay could be sticking closed-when this happen it will automatically power the fuel pump thru the inertia switch without the key-

The relay is located on the power distribution box left fender apron.

The problem is that the fuel pump continues to run while the key is on. it turns off if the key is off.

Test out the fuel pump relay

i swapped it with an identical relay but it does the same thing. other forums keep mentioning a green fuel pump relay but i dont see it anywhere.

Check the inertia switch behind the right front kick panel . Sounds more like the PCM main relay is shorting out.

inertia switch is not tripped. how would i go about checking the pcm?

I'm not talking about the computer. The computer is what am trying to avoid $$$$$$$$$$$ . Try swapping the PCM main relay don't work time to bring it in to an auto electrical specialist this one can be a nightmare to remember

i switched the fuel pump relay to the pcm power relay as they are the same part number to no benefit. despite my best efforts, i foresee this one ending up at the shop.

Try this remove fuse no.19 25amp fuse and tell me what happen.

Sir, For your Info - am viewing your electrical wiring diagram every time I give an answer

I take the #19 fuse out and turn on the key and the fuel pump does not come on. replace it, and the fuel pump comes on like normal. just doesnt shut off.

Remove fuel pump relay jumper pin 85 to 87 at the socket-tell me what happen

i have zero clue what you mean.......sorry

[quote:16d60cc1b1="phntmfoot"]Engine Mechanical problem
1995 Ford Explorer 6 cyl Four Wheel Drive Automatic 148000 miles
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When I turn the key on my truck, the fuel pump kicks on but never shuts off and doesnt start the vehicle. Per some obviously bad advice, I replaced the fuel pump. (after the fuel filter) I keep being told about a green fuel relay that could be the problem but cant find it to save my life. When the problem first came up i could shake the truck and get the fuel pump to turn off and the car could start. Not that little trick doesnt even work. Also, it will start if I spray carb cleaner into the intake but ionly until it burns that off. Thanks for your help.[/quote:16d60cc1b1]


You said your truck fuel pump runs all the time with the key on. Is it a truck or a ford explorer. Two different things. ford explorer fuel pump relay is grounded by the PCM. Maybe you need to check to see if you also have spark at the spark plugs. If not you need a test light or noid to check the injector circuit to see if it operation. With a test light test check one of the injector plugs for a completed circuit.
Take the test light put one end in one side of the plug and the other in the other side. Have someone turn the engine for you and see if the light flashes If no spark and no circuit at injectors and pump running all the time. I would expect your PCM is Bad.

Badbo

it should be getting fire from the plugs because it's starts when the carb cleaner is sprayed into the intake. also the vehicle (explorer) started (just like normal)twice today and ran for about 30 seconds and shut back off.

[quote:8e911e43b9="phntmfoot"]it should be getting fire from the plugs because it's starts when the carb cleaner is sprayed into the intake. also the vehicle (explorer) started (just like normal)twice today and ran for about 30 seconds and shut back off.[/quote:8e911e43b9] Ok it runs sometimes, but the pump is running all the time.
If the pump is running and it has fuel pressure (hope you checked that when it doesn't start) The pcm is probably needs replaced because the fuel pump relay is still grounded by the pcm. Now if you would check that circuit at the injectors when it will not start to see if the light flashes you will know for sure. A test light is a cheap item at any parts store. I am not reading this from a book. I do it every day and for the last 40 years. Hope this helps.

Badbo

What is the little grey box on the right hand side of the intake that has a 3 prong plug on it? several times, i have moved those wires and the fuel pump shuts off. then it turns back of again as if it vibrates back into a spot of bad connection.

I really think you mean the left side. The drivers side is the left side. Little grey box is the DPFe sensor is the only little grey box on the drivers side of the intake and even if you unplug the thing the auto will still start. far as I know it has nothing to do with the fuel pump. The idle air controll and tps is also located on the intake at the front.

Badbo

It may be purely coincidental but, when i move those wires around, the relay clicks off and the engine runs like its brand new. i dont get it.

[quote:834997d53f="phntmfoot"]It may be purely coincidental but, when i move those wires around, the relay clicks off and the engine runs like its brand new. i dont get it.[/quote:834997d53f] It seems you have a loose connection there some where. Try cleaning the plug and closing the pins on the plug a little.

[quote:ac7fb78a95="phntmfoot"]It may be purely coincidental but, when i move those wires around, the relay clicks off and the engine runs like its brand new. i dont get it.[/quote:ac7fb78a95] It seems you have a loose connection there some where. Try cleaning the plug and closing the pins on the plug a little.

Even though you say it wouldnt stop the truck from starting, could it be that its interacting with something else? Maybe pulling another wire that is more critical thats not making a good connection?