Question about 1992 Ford F150 SuperCab

2 Answers

What would cause no fuel pressure comining out of tank

I replaced the fuel pump it runs fo 2 seconds and shuts off i checked the ground is good i took the fuel line off the fuel filer to see if it would comew out there gettting nothing coud it be the fuel tank pressure sensor how do i test that?

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2 Answers

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  • Ford Master
  • 14,585 Answers

Either the hose came off or the line inside the tank has a hole in it. The pressure sensor has nothing to do with it.

Posted on Nov 16, 2014

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  • Master
  • 684 Answers

Try replacing the fuel pump relay.

Posted on Nov 21, 2014

Testimonial: "i replaced it"

  • Daryl Gleaton Nov 24, 2014

    Then the new pump is likely to be defective. But check all wiring including ground wire.

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6 Suggested Answers

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Posted on Jan 02, 2017

MrRodneyLong
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SOURCE: 95 F150 2wd, interrupted fuel from the front fuel tank

my idea, the pumps are working agianst each other. what is the line pressure supposed to be? I think the rear pump is burning the new pumps up. is the rear pump running when the front pump is running? Let me know MrrodneyLong@gmail.com

Posted on Jul 04, 2008

mrgreenz
  • 962 Answers

SOURCE: No pressure in the fuel line when checked at the strader valve

You need to replace the fuel pump.

Posted on Jan 20, 2009

askjhuber
  • 59 Answers

SOURCE: 1989 Ford Escort GT 1.9L HO starts then dies after a few seconds.

Check the idle air control valve. This sounds like it is not working right. it controls how much air the engine gets when it is idling. the pcm tells it to open more or close. they get old and dont respond fast enuf.

Good luck

Posted on May 16, 2009

  • 1 Answer

SOURCE: replaced oil cooler on 6.0 liter ford drove it 200

i had the same thing and it turned out to be the f.i.c.m.(fuel injector control model) relay in the engine comp. fuse box

Posted on Dec 15, 2009

ZJLimited
  • 17970 Answers

SOURCE: 2001 ford e250 5.4 v8...vehicle

Are you try scanned the PCM to know if some fault codes are stored there? Are you check injectors? We recommend to de-pressurize your fuel system. Disconnect the power to your fuel pump, by either disconnecting it's power supply, or pulling the fuel pump fuse or relay. Once the fuel pump has no power, crank the engine for a few seconds. The engine might start, but should die a few seconds later. If it continues to idle, then you didn't disconnect your fuel pump.

Once the fuel system is de-pressurized, we can begin to remove various parts from the engine bay to help clear up room. On a typical system, there is a fuel feed, and fuel return. For these types of systems, you would need to disconnect both of the lines, and then disconnect the fuel pressure regulator. The fuel injectors are held in with clips that hold the harness to the injector. Remove these clips, and pop off the wiring harnesses. The fuel rail is held in with a few bolts. Remove these bolts, and then the fuel rail should be loose. Pull the fuel rail out of the intake manifold or cylinder head, and you can now easily remove the fuel injectors.

Couldn't start his but had 40 psi fuel pressure, but even though it turned over. Are you check crankshaft, this is located crank sensor under the a/c compressor, to the left of the balancer. The camshaft sensor is in the timing cover usually behing the PS (Power Steering) fluid tank. FInally, try jumping or bypassing the fuel pump relay to test if have pressure, if this work, then go to the next device, fuel filter, then next at fuel pressure regulator and this way so on.

Keep us updated.

Posted on Feb 09, 2011

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2 Answers

No Fuel Pressure


More likely the pump is not putting gas up to the engine's fuel rail.
With key on, not start, the pump should turn on for 2 seconds to put pressure in the line and fuel rail. Do you hear the buzz or hum from the tank with key on?
Did you put a fuel pressure gauge on the fuel rail's test port (shraeder valve), and find no pressure with key on? If so, you will need to check into the pump operation (assuming the fuel filter is not clogged). A quick test is to pull off the gas tank electrical connector, find the fuel pump wire in the connector, and use a test light grounded to a metal frame or a voltmeter. Check for power on the fuel pump wire, while the engine is being cranked over. If power then, your new pump is not working. It could be the ground for the pump, so you need to check that. If no power to pump, engine cranking, then you will have to find the fuel pump relay under the hood, and check the wiring to it. There is also a fuel pump fuse-it may be under hood or in the instrument fuse panel-need to find and check it.
If the pump is working and the fuel filter is clean, you should have gas in the fuel rail (which supplies the injectors with fuel under pressure). I have not heard of a pressure regulator problem that could cause no pressure, but then...
Post back what you find, or with comments. Hope this has helped a little.

Apr 12, 2014 | 2001 Saturn L-Series

1 Answer

I have a 2001 Mazda protege. Has new fuel pump and pressure regulator, I have cleaned fuel tank , lines, rail, and injectors. Relays and fuses are good. I took breather off and sprayed fuel into throttle...


sounds like an electrical problem .pump isnt coming on .turn on key listen for fuel pump to come on for 10 seconds then shut off on its own. If you dont hear the pump then its probley fuel relay . next check wires are plugged into fuel pump. lots of cleaning ?? is the fuel rail screen plugged ???? disconnect before rail if the pump comes on next. turn on key check for fuel pumping out line .

Nov 21, 2013 | Cars & Trucks

1 Answer

Gm Troubleshoot I have no fuel pressure with a replaced fuel pump, fuel filter, fuel pressure relief value, and a new oil pressure switch. When I replace the oil pressure switch the 2000 z71, 5.3L started...


Check the fuse and fuel relay. Relay is located in electrical center under the hood on the driver side. The relay and fuse legend will be on bottom side of the protective cover. You can test it by exchanging it with another relay that you know works, (horn relay, etc.).

With the key OFF, listen carefully for a slight whirring / buzzing sound for 5+ seconds or so when you turn the key to on / run. This sound is the fuel pump running. If you hear it run, then it is most likely pumping fuel - but is blocked somewhere (crushed line?). You could disconnect the fuel line to verify fuel delivery while the pump is running if you need to. If you don't hear it; check for 12V + and GROUND at the pump. Remember, the pump only runs for a few seconds when the key is in the run position with the engine NOT running, so power will be there for a few seconds only. Check for loose / poor (+) and ground lead connections as they can cause this problem too.

Good luck!

Sep 17, 2013 | Cars & Trucks

2 Answers

Replaced fuel tank and pump and now car won't start.


no engine stated.
details are based on that..
so is it still the old pump there,
this is very simple
using a volt meter. (the pump has 2 wires, measure across those)
back probe that connector to the pump. 2 pins.

12vdc cranked, if you have 12vdc cranked
but fuel pressure is 0 the pump is gone
no pump runs on 0v, or 6v, its 12vdc there,
i can not understand those fues tests
if the voltage fails to the pump it can be
the power wire or ground wire failing .
do all tests connected, or the readings will be useless.
connected is live testing, under full real conditions
and win. every time.
if ground is tested and rises to 12vdc cranked, ground is bad.
only Ohms laws here,a simple equation.

not sure why your float fails. my guess its bad.
and easy test using ohms, disconnected.
that is another problem.

ill look at your fuse, pretend V6 engine.

the service manual shows
f10 fuse is fuel pump
12vdc both side cranking is a GOOD FUSE.
note all words above.
F10 gets all power from pump relay,
so if you dont crank the relay can be off line
an F10 will be dead.
(the schematic is clear)

here is a facts on all cars, next (pure software in PCM )
  1. pump only runs 3 seconds key on, ,
  2. pump never runs, if not cranked.
  3. run cranked and all run if engine stays running.

see? and varies by year, engine, and even ECU upgrades
so a SAVVY mech always cranks to do tests.
that means its a 2 man job. sorry but that is a reality of working any car until you learn what yours does.
warning have a care here that changes rule 1 to 2, below 20F out door temps, (fun no?)

recap
crank and measure like this.
the pump has 2 wires, red hot, black ground
meter across, pins 1 to2, red back is 12vdc cranked
meter black tests lead (volts) to body perfect metal ground
and meter red lead to pin1 red shows, 12vdc cranked
12vdc means 10 to 12vdc cranked, (battery does that)
then move red test lead to pin 2, black
cranked, 0v, if see 1 volt or ore the ground called.B26 is bad.
if the pump has 12vdc on it, you hear it,
do not run it dry its fuel cooled and fuel lubricated or you wreck it.
if it is heard to run you then see fuel spec fuel pressures.
or its bad. (30psi?)



pump-f2pntdp44mjusq0choqk2alv-3-0.jpg


pump-f2pntdp44mjusq0choqk2alv-3-1.jpg

Mar 13, 2017 | 1998 Isuzu Trooper

1 Answer

Car runs great but it starts hard having to pump it. when running it will shut off especially at low rpms.i take car out of gear and shut off and it will restart.i put new plugs and wires and tps.i tried...


This problem is caused by in most cases the fuel pressure bleeding down when the engine is shut off, this leads to air in the fuel line because the fuel leaks back to the pump and then into the fuel tank. The fuel pump is electric and it has a built in fuel pressure check valve in the pressure outlet of the pump. To confirm this is the problem you must have a fuel pressure leak down test run, the test port to check fuel pressure is on the top of the engine in the pipe that supplies fuel and sets over the top of the fuel injectors. You can purchase a fuel pressure test gauge from most auto parts stores for about $20.00. Hook the test gauge up to the test port (it looks like an oversized tire valve) start the engine and verify you have no leaks at the connection of the gauge, once that is sealed and has no seepage of fuel note the fuel pressure at idle, shut the engine down and watch the gauge, it should not drop more than 4 pounds in one hour, in most cases it will drop off right away. If the fuel pump is the problem you will need to replace it, to do that requires you drop the fuel tank down out of the car, this is a very difficult job on the ground, you will need to raise the car as high off the ground as possible, support it on jack stands and then with a hydraulic floor jack support the fuel tank and remove the filler neck then remove the two steel straps that secure it to the cars underside, once the straps are off slowly lower the tank and remove the fuel lines and the electrical connector from the fuel pump/sending unit connector, then remove the tank and remove the retaining ring that holds the fuel pump/sender module inside the tank. Reverse to assemble, then put at least 4 gallons of gas in the tank to prime the pump.

Jan 08, 2012 | 1994 Oldsmobile Silhouette

1 Answer

1996 olds 88 3.8 engine starts up runs about 15 minutes then shut down.Wait a while and will do same cycle over. I replace fuel pump, filter tank clean. No codes, engine runs find until it stops getting...


There is a fuel pump prime cycle (2 or 3 seconds)when you turn the key to on and once you start the engine the fuel pump power comes though the oil pressure switch.No oil pressure,no power to the pump.maybe your oil pressure switch has become weak?I would use a scan tool and command the fuel pump on when it does shut off,just to make sure the pump can run,as it could be a bad pump too.Also when it does quit,if you turn the key off for 10 seconds, you should get a prime cycle by turning the key to on.Have someone listen at the gas tank for a fuel pump noise,which will be only 2 or 3 seconds,but will do as a pump running check.Next would be to check for power at the back at or near the fuel pump,power and no pump.replace pump.No power to pump,follow power back to the front through oil pressure switch and fuel pump relay etc.You can always add your own power to the pump from a power source the switches off with the key if needed bypassing the existing wiring and oil pressure switch.

Mar 15, 2017 | 1996 Oldsmobile 88

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P1209,p1212,p0340,p0470,p1211 pickup dies. changed fuel filter 2 times. bled where it come out of injecter pump. got a little air first time none the next time. . replaced cam sensor. replaced fuel pump on...


Sounds like your injector pump is the fault.Have you changed the fuel filter If you have water in the fuel this would cause this problem.Try draining the fuel tank and adding fresh fuel.Hope that was helpfull good luck.

Aug 01, 2009 | 1999 Ford F250 Regular Cab

1 Answer

1997 GMC 1 ton 4x4 hard to start after it has warmed up. changed fuel filter no help No code to be read We have notice that the fuel in the rail is vapor not a liquid. Is this normal and if not what would...


The fuel pressure should hold at or near the 45 lbs after you shut the truck off.
You have one of three problems causing this.
One, the fuel pressure regulator is leaking internally and allowing fuel to return to the tank via the return line. To verify, use a pair of pliers and gently pinch the return line off. Turn the key on to the run position, the pump will run for 2 to 5 seconds and pressurize the line. Watch the pressure gauge, it should hold pressure. If it does, change the regulator.

Two, the check valve at the pump is weak. To verify, turn the key to the run position, when peak pressure is reached, gently pinch the pressure line and watch the pressure gauge. If the pressure remains near the peak pressure the check valve is bad. Replace the fuel pump.

Three, if neither of the above procedures work, you have a leaking injector. You will want to remove the fuel rail, pressurize it to find the bad injector.

Any one of these failures will cause the "vapor" issue you describe.

Good luck, let me know what you find.
Regards,

Apr 28, 2009 | 1997 GMC Sierra

2 Answers

94 dodge grand caravan no fuel in fuel rail


Dear Ron, you have replaced fuel pump and fuel filter. You have checked the fuel pump relay. Still no fuel in rail. Try bypassing fuel relay with jumper from batt to fuel pump. If o/k then check computer for ground to relay. This system uses a relay that is operated by the computer that supplies a ground for the relay to operate. The wire color is green,16 gage. If the ground is not available then "no fuel" Check this with a test light. Key on and crank apply test light to ground wire and other end of light to ground. You should hear relay click and get fuel. If this checks out you will need to replace computer or get creative with rewiring the relay so it works without computer input. Good luck Moe

Apr 24, 2009 | 1994 Dodge Grand Caravan

2 Answers

1987 Jeeps starts right up but stalls after 2 seconds


Check the alternator and see what charging voltage is... anything over 14.3 volts running should be suspect. If voltage is too high, it is possible that the computer is shutting down the engine to protect itself. I don't see any connection between the fuel tank problem though, unless while doing pump, someone accidentally grounded a hot lead and didn't think any damage had been done. This makes some sense, because the battery alone will lonly put out from 12-13volts, which go lower without alternator, till it reaches a point where voltage is insufficient to operate the ignition system. This is a "shot in the dark" and will likely lower my "rating" but I don't care about that... Try checking this... at least it points you in some direction rather than flailing around!!!
good luck

Jan 13, 2009 | 1987 Jeep Wrangler

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