Question about 1993 Ford Explorer Limited

1 Answer

High fuel pressure

80 psi at reg drops to 0 when off tried 3 differant reg. can anyone help with this

Posted by on

  • 1 more comment 
  • Al Schmittel
    Al Schmittel Apr 15, 2014

    sorry its 93 explorer 4.0 and im out of ideas

  • myamiga Apr 15, 2014

    No vacuum at the fpr will cause high pressure. Check hoses from fpr to manifold tree at the back of the engine.

  • Al Schmittel
    Al Schmittel Apr 24, 2014

    dude you are the greatest found thats what it was if your ever near the mistake by the lake (Cleveland Ohio ) i would like to by you dinner thanks so much

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    MVP:

    An expert that gotĀ 5 achievements.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

  • Contributor
  • 33 Answers

What is your vacuum at the fpr at idle?

Posted on Apr 15, 2014

Testimonial: "not sure how to check"

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 67 Answers

SOURCE: low fuel psi

try the fuel pressure regulator

Posted on Apr 06, 2009

  • 129 Answers

SOURCE: I have 87 ranger 2.9l 4x4 replaced IAC,TPS,FUEL

intank pump bad

Posted on Jun 20, 2010

jigsaw_9077
  • 308 Answers

SOURCE: I have replaced the fuel pump on this 92 Ford

The mechanic should check on the idle .Because the Idle of the truck is adjusting by it self . That causes the truck to stop .check the Idle then lock it up to so that it will not adjust until it will make the truck stop .the main reason why the truck stop and pressure guage going down steadily is that no fuel enters the fuel pump when it adjust Idle by it self . It adjust by closing way or blocking the fuel to pass and go to the engine.then the engine dies .

Posted on Aug 22, 2009

Testimonial: "Thank you, jigsaw 9077"

jeffsterrett
  • 108 Answers

SOURCE: F-150 300 ci EFI - fuel supply pressure is about

If the return line is not plugged, then you most likely have a stuck/plugged fuel pressure regulator.

Posted on Oct 23, 2011

  • 51 Answers

SOURCE: Bronco II 1987 v6 2.9-well manufacture date is 10\87 but that means parts are 88' right?

Look at your registration, note "model year" If you ar still unsure, call a Ford dealer and ask them to look up your vin #. They will know for sure.

Posted on Sep 07, 2012

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I just performed a compression test on my PT Cruiser because when it died the Oil Pressure Lightindicating low pressure came on & has remained on & I was told to check the compression.


From what you are saying you have no compression on 2 cylinders . which means that the rings are broken or worn out or you have a head gasket blown on 2 pistons . . Head off sump off replace rings , Surface the head new head gasket , big work

May 02, 2016 | 2002 Chrysler PT Cruiser Limited

1 Answer

Will not start first try but will start


If the engine starts and run good on second or third time. Install fuel pressure gauge and run the engine for a wile and turn OFF. the fuel on running engine will be 60-65 PSI. After 5 min. will drop to 40 PSI.If continue to drop to 0 PSI suspect fuel pressure regulator or fuel pump.

Apr 07, 2014 | Cadillac DeVille Cars & Trucks

1 Answer

High co reading for emission


what rpm or speed, both? which Civic engine????? of the 5
and what country????? we can not guess this... ever.
and no one ever says.. here. 99% true.
why is not easy. 50ways there are.
it's running rich. (we have one good input. this)

but here are the reasons, (not the 50 causes) all the below are tests.
it's misfiring. is rich misfire.
causes: many I'll assume the cars 12v power is 10 to 145v at all times. 13.3v running minimum.
1: low compression on one or more cylinders. 150psi w.o.t is min.
2: bad spark or not timed right. to any cylinders. or all. tests.
3: bad fueling. above must be good (tools used and tests)

now if compression is good. and the EGR main down leak
if spark is good, what causes high HC,
simple misfire.
what causes misfire.
  1. bad spark plugs (ever tune it up? now be the time, huh?)
  2. bad injectors, leaking or clogged. clean em.
  3. fuel pressure too high, 28 is min, max (see end)
  4. you find one injector , NOID lamp test stuck ON.
  5. o2 sensors stuck lean (exhaust leaks)
  6. Fuel pump regulator stuck closed, causing #3
there are 5 engines, (why not state yours.??????0
1.5 L to 3.0L
the fuel pressure is different on all .
40-47 PSI. 1.7L and 2.3L
47-54 PSI on 2.0L and 2.2L
41-48 PSI on 3.0L
and then the exceptions
1-- Except SULEV: 48-55 psi SULEV: 47-54 2 Except SULEV: 47-55 psi SULEV: 48-55 psi
if you read the FSM,, it shows tests at the rail.
fuel pressure.
fuel regulation test.
shut test
injector leak down test.
and the injector balance test.
we do them all, or fail;.
all this is FSM.

do you want us to guess or test?
the latter avoids the 50 guesses. 49 being wrong.$$$$$$$$$$$$$

Feb 24, 2014 | 2001 Honda Civic

1 Answer

I have a connector comming from the fuse relay center in the bunch of whires that is not connected and is a red wire which i know is a hot wire what do i do? connector is small and black comming out o


confusing, 1990 , CADDY a TOYOTA Escalade?
CHECK ALL FUSES in BOTH FUSE BOXES. first.

all cars have huge options, and one harness.
so vast numbers of connectors are just there. ignore them.
seems... seems in science is no good, we work in absolutes.
or better valid ranges. (as a pilot says, "in the envelope")
ill try to answer both cars, the relic toy and 2000 CAD


we fix cars by diagnosis.
the first is to tell the helper what is wrong.
it dont start. (right?
and you check both fuse boxes, for blown fuses, right?
do you have spark? y/n? on all spark plugs.? y/n
if you have spark does spray in test fuel start engine
even for 3 seconds>? a key test.
yes, then you have low fuel pressure.
no, bad engine. (or you lied about spark , lol)

now fuel pressure.
the ECU can cut fuel and pump if it sees spark go bad
this prevents crash and burn,.like as seen on TV.
connect a scan tool is there DTC 340,355 being thrown cranking 5 seconds. yes, bad crank/cam sensors. or RPM is 0 cranking
bad ckp. senor.

so, rule 2, the ECU, many not, (READ FSM) run pump
until it is cranking
so you check for 12vdc at the pump cranking,
ok i got 12v
i then check fuel pressure with a real gauge.
it see 0psi, bad pump. see 10 psi bad pump or stuck open fuel
40PSI normal there is a range, but ask.
pressure reg. see 65PSI, fuel pressure reg stuck closes or return line blocked.
no guessing ,simple tests tools $80 total.

so does test fuel run engine> do that.
ever do a tune up?
ever check spark plug tips for wet or dry , after a failed crankup?
dry, no fuel. add some.
wet ,flooding.. crank using super secret WOT.


ok a direct quote from the FSM TOY.
  1. Using a jumper wire, short terminals FP and +B of the check connector.<< this is the diagnostic port.
  2. Turn the ignition switch ON, but do NOT start the car.
  3. The fuel pressure should read 38-44 psi (265-304 kPa).
  4. If the pressure is too high, the pressure regulator is probably defective. If it is too low, check for the following:
    1. Fuel hoses and connections for leaks or restrictions.
    2. Defective fuel pump.
    3. Clogged fuel filter.
    4. Defective pressure regulator.
now the direct quote for CAD FSM.
what engine,there are many?
rule 1 , 2000
ever scan the ECU/PCM for error cranking or must we do this the hardway.
hard:
key off
pressure gauge on rule rail
not started engine.
60-66 psi is normal. (books shows scan too activate)

the FSM shows the leak down test too, at this port.
it also says using CAD scan tool command on the fuel pump.
says tool only allows 2 seconds run time,
but you can check it cranking or cranking then key
off see how fast 60psi drops.
there are many pump tests. and the leak down rate
and injector leak down test.
all this requires a fuel pressure gauge
and reading the tests on alldata.com or buy the full FSM from CAD.

Im sure the CAD only has pump power (12v) cranking and running
and running it drops about 10psi and rises at high altitude.
they wouldn't need

PUMP operation rules are complex.
this is all hard coded in the PCM brain this logic.
most cars are,
if sparks good, and not W.O.T cranking and cmp and CKP are
happen run pump and inject.
if not , cut fuel.
some cars cut the pump after 2 seconds running, its hard coded logic. if spark is bad.
many mech dont know this. but the only variace ive ever seen is
some cars do make fuel pressure. just key on, for 3 seconds.
mostly older cars.
my guess you posted in the Toyota section?

Dec 29, 2013 | 1990 Toyota Corolla

1 Answer

Fuel pressure bleeds off when i turn the key off . is that suposes to happen or is it suposed to hold pressure


once car is stared and you shut it off it starts right up but if you let it set for three min. or maybe longer its hard to start it has new fuel pump pressure reg new fuel filter plugs wires can some one help me

Mar 11, 2012 | 1999 Chevrolet Silverado 1500

1 Answer

I have a 00 F250 after the truck is warm and under a load the fuel pressure falls to around 12 psi the fuel filter and pressure regulator are new fuel pump is 6 months old


i know pressure reg. is new but its bad. try when first crank up put a vacuum pump on reg. if pressure drops then drop replace it

Oct 28, 2010 | 2002 Ford F250 Super Duty SuperCab

2 Answers

1997 tahoe wont start


it is not the regulator if it has 40 lbs of pressure try to pinch off the return line and if pressure drops quickly it is either the check valve in the pump or the rubber seal between the pump and the sending unit

Nov 08, 2008 | 1997 Chevrolet Tahoe

4 Answers

Service engine light on showing code p0089


Diagnostic trouble code P0089 - The ECM commands the Bosch high-pressure fuel pump to deliver a specific fuel rail pressure - that can vary up to 23,000 psi depending on load and speed. The actual pressure is monitored via the fuel rail pressure sensor. If the fuel rail pressure varies more than desired or if commanded fuel pump flow is 100mm3/second or less, DTC P0089 will set.

Corrective action includes measuring the fuel rail pressure using a Tech II scan tool, then compare that to commanded fuel rail pressure with the engine running at 2000 rpm. The difference must be less than 20 Mpa.

A blockage in the fuel tank or plugged fuel filter could cause this fault (excessive vacuum in fuel line). If there is less than 5 in Hg of vacuum when measured at the fuel pressure test port at 3000 rpm, the fuel pressure regulator could be defective, and may need to be replaced. The fuel pressure regulator (FPR) is a sub assembly located on the Bosch high-pressure fuel pump.

Jul 30, 2008 | 1996 Chevrolet Cavalier

Not finding what you are looking for?
1993 Ford Explorer Limited Logo

Related Topics:

98 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

75797 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers

fordexpert

Level 3 Expert

5495 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...