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Symptoms of bad fuel pump

How to replace a the fuel pumps

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Erratic sound from pump, loss of power(especially uphill) and sometimes won't start when hot.

Posted on Jun 22, 2014

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Posted on Jan 02, 2017

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SOURCE: Diagnosing and replacing fuel pump on 2002 Eurovan

Every time you open your drivers door you hear a buzzing sound under the car. That sound is from a working fuel pump priming fuel before you even enter the bus, anticipating a system start up. If you don't here it then it must have seized. More often it happens during early morning or when it sat for quite some time. You can also operate the fuel pump manually by using a jumper wire to the relay. The relay number could be 67, 80 or 167. I wouldn't recommend this if you have minimal experience working on fuel systems, it's very dangerous. It will spark if done incorrectly and set off a fire.

Posted on May 01, 2010

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SOURCE: not getting fuel to engine

You don't say if the car is diesel or petrol. Diesels have to be primed

Posted on Mar 06, 2013

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What are the sign's of your fuel pump going bad?


The most obvious bad fuel pump symptoms is your vehicle won't start, or it starts but does not run for very long before eventually stalling out. Your vehicle will act as though it is out of gas, even though the fuel tank is full. As the fuel pump attempts to feed the engine fuel, your vehicle may make bucking noises but will not spark up.
If you do suspect that you have symptoms of a bad fuel pump, you can listen to it to see if it is operating. Electric fuel pumps can be heard when you turn the ignition to the second position, so if you do not hear any sound coming from your fuel tank with the key turned, your fuel pump may have failed or the motor may have burnt out. Also, if you notice that the fuel pump is making an excessive whining noise, it may be a sign that the part is on the verge of failing.
Two common bad fuel pump symptoms that your vehicle may experience are engine misfire at higher speeds, or difficulty climbing hills. These symptoms are a sign that your engine is not getting enough fuel. If you are experiencing these symptoms, you may want to perform a fuel pump pressure test.
In order to perform a fuel pump pressure test, you will require a fuel pressure gauge. By inserting the gauge in the Schrader valve (usually located in the engine compartment), you will be able to determine if your engine is receiving adequate pressure of fuel from the vehicle's tank. The required pressure reading will be different for vehicle specific applications. Most repair garages have one of these gauges on hand to perform this test.
Your fuel pump may fail or become a faulty fuel pump for a number of reasons. Rust, debris and dirt may enter into the vehicle's fuel system, and may potentially be clogging the fuel filter or the fuel strainer. This does not allow enough fuel to pass through to the fuel pump which overheats the parts, causing damage. A second cause of fuel pump failure is damage to internal parts caused by small particles of dirt entering into the fuel pump. The fuel strainer and fuel filter were unable to keep these particles from entering into the fuel. Another major cause of a faulty fuel pump or failure is letting your gas level get too low. When the level of fuel is low, the fuel pump has to work much harder, becomes overworked, does not cool down properly, and as a result can be damaged. You should never let your fuel reach less than a quarter of a tank.

Sep 12, 2013 | 1995 Lincoln Town Car

1 Answer

Replaced fuel pump and truck won't start


There is a fuel pump module electrical piece associated with powering up the pump. Most generally they are located on the frame just behind spare tire. when looking from the rear of the vehicle. Sometimes these corrode and cause the symptoms to be the same as bad fuel pump. Hope this helps.

Jan 16, 2013 | 2002 Ford Explorer

5 Answers

Check engine light flashing, spuddering and rough


Have your codes read. Autozone does it for free. Only then will you have an idea of where to start looking.

Oct 26, 2011 | 2001 Kia Sportage

1 Answer

Transit pump code p0216 how can i fix this


P0216 DTC - Injection Timing Control Circuit Malfunction and this means the diesel fuel injection pump has a timing failure. This could be that the injection pump timing needs adjusted OR the failure is internal to the injection pump and therefore non-adjustable.

NOTE: If your vehicle is a Dodge Ram with Cummins engine then be aware that fuel delivery problems frequently cause this code. Prolonged fuel delivery problems can cause injection pump failure!

Symptoms of a P0216 DTC may include:
Low power
Crank, but no start
Hard start
Displays an intermittent stumble or miss
Engine may start and then stall
Engine may appear to drive fine but surge at idle


The most frequent cause of this code is a bad injection pump due to poor fuel delivery. Fuel delivery problems could be:
A plugged diesel fuel filter
An in-tank blockage
Air in the fuel due to a cracked in-tank fuel ine above the fuel level
Bad transfer (lift) pump
Injection pump out of time


Possible Solutions: First, simply check if your injection pump timing is adjustable. If so, check the timing and adjust if necessary.

If you think that you may have a fuel delivery problem, then check the lift pump operation. On Dodge Ram with the Cummins engine, the lift pump should produce about 45 oz of diesel in 25 seconds of operation. This can be performed by disconnecting the fuel hose from the injection pump and pumping the fuel into an approved container. Bump the engine over but do not start it. Then the lift pump will operate for 25 seconds. If the fuel is aerated, then check/repair fuel line and recheck.

With the fuel hose connected the fuel pressure should be 10psi. If the fuel delivery tests fail, replace the diesel fuel filter and recheck.

If it still fails then verify there are no restrictions in the fuel tank

Then replace the lift (transfer) pump. IT SHOULD BE NOTED that if this code surfaced after a routine fuel filter replacement or if you have any of the above symptoms after routine fuel filter replacement, then suspect the fuel transfer pump. This occurs because even a weak transfer pump can still provide enough fuel for the engine to run. But when the fuel system\'s prime is lost due to fuel filter replacement, it may not restart again without fixing the fuel delivery problem.

If you found your injection pump to be bad, the lift pump should be checked for operation to protect the new injection pump. This is because weak or low output from lift pump are common cause of injection pump failure. There are some aftermarket kits that can be purchased to warn the operator when the fuel pressure/volume drops to level that could damage the injection pump.

Hope this helps (remember to rating this free answer and leave a testimonial comments).

Oct 11, 2011 | Cars & Trucks

2 Answers

What are the signs and symptoms of a fuel pump needing replaced. Other than the obvious that the car will not start 2000 Nissan frontier V6, 3.3L 4x4 crew cab


You don't hear it running when your turn the key on just before the crank position.

You have replaced the fuel filter and it was pretty much stopped up. (destroyed pump trying to pump through stopped up filter.)

Because it was going bad you couldn't drive fast because it wasn't pumping enough fuel.

Disconnect fuel line and see if fuel comes out when you turn the key on.

Dec 23, 2010 | 2000 Nissan Frontier

1 Answer

Where is the fuel pump relay located. i have a 2003 honda odyssey 3.5 v6


  • A clogged fuel filter or problems with the electrical system powering the fuel pump can result in symptoms similar to a failed fuel pump. Have the shop verify that the pump is the problem before replacing.
Best Practices
  • The fuel filter should always be replaced when replacing the fuel pump.
Common Symptoms
  • A failing fuel pump will not create enough pressure in the fuel system, potentially resulting in a loss of engine power or a "no start" condition. You may also have a lean running condition that can set a diagnostic trouble code and turn on the Check Engine Light.
  • Fuel pumps require replacement if they leak or begin making too much noise, which is a sign of malfunction. the fuel pump relay is located under hood inside a box with alot of other fuses in it and relay it will be maked fuel pump relay

Dec 13, 2010 | 2001 Honda Odyssey

1 Answer

I am having problems getting fuel to my carberator on my 1985. F-250 4wd. (mfrd 11-84) 7.5 liter gas, dual tank. The engine will start for several seconds & then stall out as tho the fuel is cut...


there is a electronic switching device underneath on frame that switches from tank to tank check that to see if it is bad.
I have had them go bad in the past and had to temporarily hook up electric fuel pump to pump from 1 gas tank to get home.

Nov 14, 2010 | Ford F-250 Cars & Trucks

2 Answers

2001 Blazer: what are symtoms of a bad fuel pump?...


My fuel pump just went bad in my 2001 Blazer. The mechanic told me that the first symptom, which my Balzer had but I didn't know it was a symptom,was the gas gauge jumping around especially when it was low on gas. Another symptom is a surging feeling. The pump itself is about $600 plus labor. They have to drop the fule tank to replace it.

May 06, 2010 | 2001 Chevrolet Blazer

5 Answers

How do you know if your fuel pump is going out


The best diagnostic for the fuel pump is a pressure test. Need to know the specs on it (should be around 40-60 PSI), hook it up to a fuel pump tester and there you go.

The symptoms the engine presents when a fuel pump is going bad could include:

- hard to start
- hesitation
- loss of power upon acceleration
- going dead at idle
- others...

But other problems could cause these same symptoms.

Charlie

Aug 23, 2009 | 2000 Ford Taurus

2 Answers

Falls dead when driving, will restart after awhile


Did you try checking or replacing the coolant sensor? I think you should replace it along with the thermostat. Are there any problems like sputtering or any unusual noises or symptoms? Smoke, anything?

May 06, 2009 | 1991 Oldsmobile Cutlass Supreme

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