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  #16  
Old 09-05-2011, 09:40 AM
Midwest Dually Midwest Dually is offline
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Default Re: Fuel Sensor...Fuel Pump...????

Quote:
Originally Posted by FireRanger View Post
In the 12 years I've owned a ranger and been on ranger forums, your the first person to have this problem. So apparently it isn't as troublesome as you would like it to be.
That is one thought.. This is another..

http://www.fordrangerforum.com/4-0-s...tart-warm.html

http://www.fordrangerforum.com/4-0-s...led-again.html

http://www.fordrangerforum.com/4-0-s...tter-what.html

Fuel Pressure

1994 4.0 OHV Running Poorly

http://www.fordrangerforum.com/4-0-s...ing-while.html

http://www.ford-trucks.com/forums/10...need-help.html

Fuel pump ground location

Driving and engine randomly dies

http://www.fordrangerforum.com/4-0-s...-problems.html

http://www.fordf150.net/forums/viewtopic.php?t=65300

http://www.allfordmustangs.com/forum...t-failure.html

93 4.0 Ranger won't start
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  #17  
Old 09-05-2011, 09:44 AM
FireRanger FireRanger is offline
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Default Re: Fuel Sensor...Fuel Pump...????

You're misunderstanding completely. I'm saying the problem being the PCM is rare and that I don't recall it ever happening. Not fuel pump related problems all together.

The reason I'm making that point is so you make absolutely sure there is nothing else wrong. Rule out the very likely and common stuff before moving on to a very unlikely and expensive thing. I'm not saying its impossible. Just that that you exhaust everything else first.
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Last edited by FireRanger; 09-05-2011 at 09:51 AM.
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  #18  
Old 09-05-2011, 11:15 AM
Midwest Dually Midwest Dually is offline
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Default Re: Fuel Sensor...Fuel Pump...????

And for that I do appreciate the help on.. It is important to rule out everything else before taking a heavier stab at something more costly.

Believe me.. I did exhaust everything else. I wanted more then anything for it to be something as simple as a connection or cheaper part!

For the OP here, I am curious to see what his outcome will be.. Similar issues, not saying identical problem. More research has to be done of course.

The more research I have done regarding fuel delivery in these trucks, the PCM/ECU, and general bugs relating to a degree in this issue, makes me wonder! I keep seeing more questions relating to starved fuel systems, scan issues, fuel related switches and electrical gremlins dealing with this, that it makes me wonder. Perhaps with more people finding solutions, then a "sticky" can be made for easy referrence?
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  #19  
Old 12-24-2012, 12:51 PM
Lil'RedRyder Lil'RedRyder is offline
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Default Re: Fuel Sensor...Fuel Pump...????

Hello, Midwest.. & Fire... Hopefully one or other still around-- anyway, have '97 Ranger, 4.0 OHV, 2 wd, 5-auto, 120K mi, orig ownr. Have this elusive fuel pump problem. All fuel system components, replaced, checked/rechecked/verified, all relays, connections, wiring harnesses unplugged, replugged, jiggled, jangled, knocked-on and everything but impregnated.
When switched on fuel pump contines to run, it'll crank, but no start. If pump turns itself off after second or so, after switch on-- cranks & starts & runs fine, no stalls, no problems until I turn it off. Sometimes, less frequent pump doesn't come on at all, again cranks, but no start. When fuel pump does turn itself off after a second or so, there is a 'click' from the underhood relay box. All relays, checked/swapped with new ones.
NO CEL'S / codes!! But I don't have computer/scanner to check internal stuff. I think it might be something in my PCM, but??
So, MidWest... what was your final resolution or anyone else??-- HELP!!

Added 12/27/12: Fuel return system and pressure is steady 38 psi at rail, when swt/pump on & holds when off. I can hear fuel gushing thru regulator when pump running. Inertia sensor verified. The culprit, IMHO is: whatever tells fuel pump relay initially to turn on and/or to turn off after a second or so -- or the wiring involved with these events.

Last edited by Lil'RedRyder; 12-27-2012 at 02:22 PM.
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  #20  
Old 12-25-2012, 06:48 AM
dworth24 dworth24 is offline
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Default Re: Fuel Sensor...Fuel Pump...????

change the fuel pump. i had a continuous fuel problem and every mechanic told me the same thing, it wasnt the fuel pump, when a fuel pump is going it goes. it doesnt present intermittent problems. well thet were all wrong, the problem ended up being the fuel pump. it worked when it wanted to and when it didnt want to it didnt work. we changed fuel pump and have been good ever since. a heads up, unbolt the bed of the truck and slide it back to change pump. very easy. many people feel they have to drop the tank. not necessary and much harder of a job. good luck
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  #21  
Old 12-26-2012, 03:21 PM
Lil'RedRyder Lil'RedRyder is offline
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Default Re: Fuel Sensor...Fuel Pump...????

Thanks for reply, Dworth24-- sorry I wasn't clear in my post, but I did replace fuel pump, as well as every other commponet in the fuel system-- not change any of that made. A little more info, may not be useful-- this all started with an erratic high idle, I then changed IAC sensor & no more erratic idle, but then this fuel pump 'no turn off' problem started. I'm about ready to turn it over to Ford shop, but will hang here a few days more-- breaker, breaker FRF-- Midwest Dually??, you out there??
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  #22  
Old 01-12-2013, 12:20 PM
Lil'RedRyder Lil'RedRyder is offline
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Default Re: Fuel Sensor...Fuel Pump...???? (one final solution)

Final Solution-- took to local indy shop, his scanner was inconclusive, but pointed to memory was gone & needed reflash from Ford. Took to Ford, diagnosis was ECM/PCM was dead. Got remfd Cardone unit from O'Reilly's ~$160, Ford installed/reprogrammed it. Total Ford cost~$300. Back on the road, good as before. Hope yours won't be as difficult.
Thanks for the info here and encourage others to post final solution to their problems. jh
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  #23  
Old 10-26-2015, 09:02 AM
OldcarsRbest OldcarsRbest is offline
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Default Re: Fuel Sensor...Fuel Pump...????

Quote:
Originally Posted by Lil'RedRyder View Post
Thanks for reply, Dworth24-- sorry I wasn't clear in my post, but I did replace fuel pump, as well as every other commponet in the fuel system-- not change any of that made. A little more info, may not be useful-- this all started with an erratic high idle, I then changed IAC sensor & no more erratic idle, but then this fuel pump 'no turn off' problem started. I'm about ready to turn it over to Ford shop, but will hang here a few days more-- breaker, breaker FRF-- Midwest Dually??, you out there??
Hello Lil'RedRyder-
I ran across this while searching for clues. I have I think the same problem; When in it's normal state, if I turn the key to on (run), I hear the fuel pump at full pressure (full voltage?), then in 3 seconds or so, I hear the relay click off-I can then start the truck with no problems. The last several months, I have had an issue where when I turn the key on, I hear the fuel pump but it is either atruggling/low voltage/low pressure, and I can crank the engine forever and it will not start. I have noticed that when in its bad state, the 'check engine' light and the 'battery symbol' are very weak (low voltage?), where they are full bright when in its good state.
1993 Ford Ranger XLT 4.0 5 speed manual.
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  #24  
Old 10-26-2015, 11:58 AM
barneycat11 barneycat11 is offline
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Default Re: Fuel Sensor...Fuel Pump...????

Check the fuel pressure and if it's ok check the reset switch under the passenger side top floor mat.There made to shut off in a crash it might be bad.
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