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Touch forgot password. Provide a delivery point. A good e-mail address.

Posted on Nov 10, 2014


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

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My 2001 jeep grand Cherokee larado L6 4.0 I have a crank/no start condition I got spark and fuel pump is coming on/

the pump can make noise, good or bad.
its just a simple dc motor rotor pump.
this jeep is EFI so pressure matters not sounds.
if the pump sounds dead that is dead pump or no 12vdc power to it, voltmeter wins this battle.
why not learn first that nostarts have 50 causes.
one can guess
one can replace parts in statistical order (sorry your car never reads stats)
or one can learn to diagnose EFI. i cant teach you in this box.
but I can put you on the correct track for sure.
1: lets pretend the ENGINE is ok , the larger list of parts bad.
2: and go for SPARK. no gas engine runs with no spark so
is like NUMBER ONE first test
GOT SPARK , my guess is you dont even know what that means.
google or youtube how to test spark, 10,000 examples for 100 years running. (car repair for dummies in the book store "?)
3: spark needs to be good on all 5 cylinders. not 1.
so most fail to do that, lazy or ? i dont know why.
this engine and this year runs a odd huge single coil rail pack
so not scanning the PCM now ,is really making the job hard.
to do this correctly lacking most tools. (scanner missing)
the FSM tells you how. its free to read, why not read that now
in the offical jeep book.
what is done is the pack is racked back(unbolted )
and test spark plugs used.
if you know EFI, you know 2 things, in same book
do not short plugs. nor run them open circuited , on purpose.
so getting 6 plugs there and 6 grounds, is a daunting task.
for most persons, (not the shop its normal)
chapter 8I (8 india) in the FSM is SPARK chapter, read it now.

if the spark test passes then test fuel, test passes.
instant start spray in a can, buy it in any auto store earth.
if that works engines sounds great. then
we ATTACK fuel now.
next is fuel pressure,
just because a rail fitting shows leaks fuel test.
means nothing , it only means the pump is not 100% dead
EFI need spec pressure to run any engine,
case in point, 10 PSI the engine can not run.
the running fuel pressure is
49.2 psi 6 5 psi). not 10.
over 55.4psi is bad FPR
the books says, below 44.2 psi (weak pump or FPR bad)

there you go, all way to find this, (engine good)
Mr, otto cycle engines, same deal for 100 years

engine good. CAT convertor not melted.
good spark x6 (this case)
and proper fueling , not starving not flood , it starts.
THE PCM does FUEL and SPARK now from 1988 to now.

Jan 20, 2017 | Jeep Cars & Trucks


FPR - Fuel Pressure Regulator

<p><b><span>2.1) <span> </span><u>FPR - Fuel Pressure Regulator </u>(actuator/passive)<u></u></span></b><br /> <p><b><u><span><span> </span></span></u></b><br /> <p><b><span>What is it?</span></b><span><span> </span>The fuel pressure regulator is a mechanical device that maintains a well regulated level of pressure in the fuel rail to the fuel injectors. <span> </span></span><br /> <p><span> </span><br /> <p><b><span>Where is it located?</span></b><span><span> </span>The FPR is a metal circular device most usually located on the end of the fuel rail on the engine. Attached to its top is a vacuum line from the intake plenum. </span><br /> <p><span> </span><br /> <p><b><span>How does it work?</span></b><span> The fuel pump(s) supply fuel at high pressure to the fuel rail. Excess fuel pressure, above that required for satisfactory injector operation, is released by the FPR by allowing fuel to return to the tank via the fuel return pipe.<span> </span>The FPR consists of a diaphragm valve held closed by the constant force exerted by a spring.<span> </span>Once the pressure of the fuel in the fuel rail exceeds the force of the spring on the valve then fuel bleeds past into the return pipe.<span> </span>The action of the spring is opposed by the effect of a vacuum line (from the intake manifold) acting on the diaphragm.<span> </span><b><i>When the car is at idle the high vacuum conveyed in the line from the inlet manifold to the FPR ensures that only a modest pressure of fuel is allowed in the fuel rail to the injectors.<span> </span>As the engine speed increases there is reduction in vacuum, the spring action is less impeded and the fuel pressure increases.<span> </span>By governing the period of each injection cycle at a given fuel pressure the ECU is able to maintain appropriate and economical use of fuel in response to engine demand</i></b>.</span><br /> <p><b><u><span><span> </span></span></u></b><br /> <p><b><u><span>Symptoms of faulty FPR </span></u></b><br /> <p><b><u><span><span> </span></span></u></b><br /> <p><span>A faulty FPR has many similar effects to that of a faulty MAF namely:-</span><br /> <p><span> </span><br /> <ul> <li><b><span>Rough running</span></b><span> - if the diaphragm is inoperative or the vacuum line has a minor leak the fuel pressure in the fuel rail will be increased.<span> </span>The amount of fuel injected per cycle will be poorly regulated and this will make the engine 'lumpy' due to too rich mix.<span> </span>If the vacuum line to the FPR has a major leak or has become disconnected then the introduction of unmetered air into the inlet plenum will cause bad idling due to too lean mix.</span></li> <li><b><span>Difficulty in starting</span></b><span> - there are two effects here: </span></li> <ul> <li><span>1) If, as above, the effect of the vacuum line to the FPR has a small leak then the engine will run rich to the extent that excess fuel may flood the engine.<span> </span></span></li> <li><span>2) Fuel may exit a faulty FPR diaphragm via the vacuum line and enter the intake manifold again either flooding the engine or making it too rich to ignite.<span> </span>In this circumstance the opening of the throttle fully by pressing hard on the accelerator pedal may result in the engine firing as more air is introduced creating a better mixture ratio. </span></li> </ul> <li><b><span>Poor fuel economy - </span></b><span>Rich mixture due to a faulty FPR allowing high pressures in the fuel line will cause excessively high fuel consumption<b></b></span></li> </ul> <p><span><span> </span></span><br /> <p><b><span>How to check?</span></b><span><span> </span>When the engine is at idle, disconnecting the vacuum line to a healthy FPR should result in a temporary surge in engine revs for a few seconds as the immediate loss of vacuum to the FPR causes an immediate build up in fuel pressure. At each injection cycle a little more is injected causing the engine to build up revs.<span> </span>In the next few seconds the gradual ingress of unmetered air into the plenum, also caused by the disconnected vacuum tube, begins to upset the stable idle of the engine. <span> </span>The engine will suffer from rough idle until the vacuum line is reconnected. <span> </span>Most of the injection inputs will be crudely governed by signals received from the MAP sensor and feedback from the oxygen sensor. </span><br /> <p><span> </span><br /> <p><span>A technical check in FPR function is to connect a fuel pressure tester to the fuel rail.<span> </span>There is usually a threaded connection port on the fuel rail consisting of a Schrader type valve; more commonly seen on car tyres.<span> </span>Testing the fuel pressure not only shows whether or not the fuel pressure regulator is capable of maintaining a consistent pressure but it also checks the fuel pumps' capability of providing the necessary pressure. <span> </span>Pressure in the rail should be highest when the throttle is open and lowest at idle.<span> </span>Pressing the pin in the middle of the Schrader valve is a quick way of depressurizing the fuel rail, akin to letting the air out of a tyre. </span><br /> <p><span> </span><br /> <p><b><span>How to Fix?</span></b><span><span> </span>Check for the presence of fuel from the open end of the disconnected vacuum line to help ascertain the health of the FPR diaphragm.<span> </span>If the FPR is faulty it is simple and cheap to replace it.</span><br /> <p><span><br /></span><br /> <p><span><b>NEXT 2.2) ECT - Engine Coolant temperature sensor </b></span><br />

on Jul 22, 2011 | Mercedes-Benz E-Class Cars & Trucks

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How do you fix a suzuki liana when the fuel is not pumping through to motor? Is there a reset butto.n?

no year stated.
posted 3 times. as 3 problems.
no country stated, we dont have these here
ours are called Aerio's
what engine? per list.?????
1.3 L I4; 1.5 L I4; 1.6 L I4; 1.8 L I4; 2.0 L I4; 2.3 L I4; 1.4 L Diesel I4

no there is no reset. its not a ford or isuzu.
how to repair cars dead engine, varies by country and engine
not one stated. here.
here ill make a generic GAS/petrol list for you (lacking country or engine)
1: check the fuses.
2: turn key ,CEL lamp in cluster on? Yes/no.?
yes, good
no fuses blown..
3: look again in the cluster, did the IMMO lamp come on? (some countries the lamp looks like key with a red bar crossing it)
this lamp must not stick on or flash, or IMMO is unhappy. (immoblizers)
4: ok CEL ON, IMMO off, does it crank fast the starter motor? if not say so.
5: good it cranks?
yes, then do you have spark>? on all cylinders?
yes, good, no scan it. OR NO ITS A DIESEL>??>??
6: Ok i got spark (if gas engine)
7: lets say the spark is weak, ever do a tune up?
7b: lets say spark timing is way off. ever replace the cam belt>????
8: spark is good. must be fueling issues.
be advised that if PCM sees spark bad it does cut all fueling by design and laws...
9: now i use test fuel, and it runs.
yes runs. for 3seconds good.
no, see 1 to 8 above or compression is bad.
yes, the check fuel pressure. good?
no fuel pressure is 0 psi
so i check for 11-12v at the pump wires. cranking
you need to crank the engine because 1/2 the cars
made only run pump cranking, and all do running.

1 question ever turn the car up ever
or do the 60k mile or100km service list? "points"

Jun 13, 2015 | Suzuki Liana Cars & Trucks

1 Answer

99 ranger 3.0 am i suppose to have pressure at the bleed off valve in front of the fpr with truck not running i have constant pressure is fpr bad?

You should ALWAYS have pressure at the FPR. If pressure drops when the truck isn't running, the FPR has failed.

May 12, 2015 | Ford Ranger Cars & Trucks

1 Answer

2000 Toyota Echo coupe sure to pass smog all spec's and testing

You probably already learned that you should have taken it to a reputable repair shop. Whenever a vehicle wont pass emissions, don't try and fixing it yourself, take it to the dealer and let them use the skills and tools they paid thousands of dollars for just to help you get your car back on the road.

Aug 07, 2014 | 2000 Toyota ECHO

1 Answer

2001 gmc jimmy wont stay started

check the fuel pump relay, some gm vehicles default to the oil pressure switch if the FPR fails.

Mar 17, 2013 | 2001 GMC Jimmy

1 Answer

Rpms will jump to 2500 and stay between 2000 and 2500rpms.

Is your car a V6 or a 4cyl engine? I have a ton of experiance with the Probe GT V6. So all the following info is for the V6 model ONLY!
First Is your Check Engine Light on? If so Pull the Engine Codes. It is easy to the pull the engine trouble codes on this car. All you need is a paper clip or a piece of wire. Here is a link to a website that will tell you how to check the engine codes and will give you what each code means. . After you pull the codes that will point you in the right direction. There are too many factors without knowing more information that could be part of your problem. If you post your Engine Trouble codes i can be of more assistance. But a it sounds like you may have a bad fuel pressure regulator(FPR). A quick way to check your FPR is to start your car and let it run at idle. Than pull the Vacuum hose off the FPR nipple. Now take your finger and rub it against the FPR nipple and see if you can smell fuel or see fuel coming out of the nipple. If there is a strong fuel smell on your finger than the FPR may be bad. Than let the car idle and with the vacuum hose still disconnected, watch the FPR nipple for 5 to 10 minutes and see if any fuel starts to come out the the nipple. If fuel starts to drip or shoot out of the FPR than it is definatly bad and you need to replace it.

Feb 03, 2013 | 1993 Ford Probe

1 Answer

Process to remove fuel pressure regulator95 escort 1.9 Any tips on removing fpr ? Great job by ford of making fpr hard to remove

It is easier to change the fuel pressure regulator if you remove the fuel rail from the engine, you do not have to remove it from the car completely, but undo all of the injector wires so you can slide it out to the right side of the vehicle, it will make it easier to rotate it over to reach the screws, hope this helps, let me know

Nov 24, 2009 | 1995 Ford Escort

1 Answer

Car starts dont run

Go to autozone, there you can rent their tool to check the pressure of your FPR. Then you should be able to connect that tool to your cars fuel line. Which will tell you the pressure.

This could and very well may be your fuel pump. Fuel pressure regulators dont go out too often.

May 30, 2009 | 1998 Chevrolet S-10 Pickup

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