Question about 2002 Jeep Grand Cherokee

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The fuel pump whines after the engine is started and intermitently after that

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Its getting tired 

common cause is drive with the gas tank continuously low the pumps are designed to be cooled down by the gas around the pump keep gas tank full as much as possible.

Posted on May 10, 2010

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3 Answers

2007 frontier turns over but will not start


You need fuel and spark to run. Vehicle is about the age that fuel pump goes. Have someone get in vehicle and close door (so key chime sound not interfering) turn key to on - but not all the way to start and while they do that stand behind, or next to, vehicle and listen near gas fill door, or even bend down and listen near tank, for the whine of the fuel pump. It should make a whine sound for a few seconds and then turn off when full pressure reached. If no whine, or whine never stops - fuel pump may need to be reset or pump is bad. Check vehicle manual for fuel pump reset switch (usually in passenger foot well or trunk area) and try that button. If fuel pump starts working after reset try starting. If pump is working but still no start then pull a spark plug and ground the base of it to engine and have someone crank it to see if spark is happening at end of plug. Those are first steps to see if you have fuel and spark.

Jan 17, 2015 | 2007 Nissan Frontier SE Crew Cab

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Car wont start suspect petrol pump


Turn your key to "ON" or "RUN" position. You should hear a whine coming from the rear of your car for a couple of seconds then stop.. That is the fuel pump priming your fuel delivery system. After you start your car, you should continue to hear the whine, but not as loud. That is your fuel pump delivering fuel to your engine. If you don't hear a whine then check all connections, fuses, relays related to your fuel delivery system.. If you hear the whine for prime, then check your fuel rail(s) for pressure. If you have pressure, then it is likely a Spark or an Air problem. Do you have any check engine warning lights on? If so, take to autozone (or similar) and they can check the error codes (DTCs - Diagnostic Trouble Codes) and print them out for you to work on.

Apr 25, 2014 | 1996 Audi A4

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Problem starting


When you turn the key to on before start do you hear the fuel pump whine for a few seconds? If you hear the whine it could be fuel filter or no spark. If no whine squirt gas into throttle. Then start the car if it starts the problem is in fuel delivery (bad fuel filter, fuel pump or fuel pump fuse). If it did not start then its spark related(cam or crankshaft sensor, ignition coil)

Dec 25, 2013 | 2001 Ford Escape

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Van will not start


Can you hear the whine of the fuel pump with key-on, engine-off? You should hear this whine correspond with the fuel pump relay, located in the relay centre under the hood. It should run for about 3 seconds and then turn off. Of course, this is just the first preliminary step to trouble shoot a no-start condition. Checking for fuel, spark and spark at the right time, are always the first things to be certain of, before you can go any further. Just a note: GM products will only cycle the fuel pump once for every key-on, engine-off cycle. You will need to crank the engine and then turn off the key to reset the pump relay.

Feb 08, 2013 | 2007 Pontiac Montana

1 Answer

Constant whining noise from fuel pump


    1. Low Fuel

      Fuel pumps work by pressurizing the fuel and sending it to the engine. A low fuel level can cause the engine to work much harder to build the necessary pressure to pump the fuel. To analyze the problem, start the car when the fuel is low (below one-fourth tank) and listen for the sound. If the whine is audible, fill the tank immediately. When you start the vehicle again, the whine should be reduced or absent. If not, there may be another problem.
      Damaged Pump

      The whining noise may be caused by a damaged fuel pump. The fuel pump may be punctured or dented, reducing its efficiency. To resolve this issue, the fuel tank must be accessed and repaired or removed. The location of the fuel tank depends on the construction of the vehicle. In a vehicle equipped with a carburetor, the fuel pump is often located outside of the fuel tank. With a vehicle that has a fuel injector, the fuel pump is located inside of the tank. It is best to get a mechanic to address this problem.


      Impurities in Gas Tank and Engine

      • If the fuel pump is blocked by engine gunk, dirt, impurities in the gasoline or anything else, it will respond with a whine or some other very noticeable noise. Debris in the fuel tank can be sucked into the pump most easily when the tank is low. This debris gets caught in the pump and reduces the pressure. This problem must be fixed by removing the blockage which should be performed by a mechanic. Using fuel additives that clean the engine and keeping the fuel tank filled may also be a preventative measure.

    Jul 02, 2012 | 2004 Land Rover FreeLander

    1 Answer

    I have 1991 GMC syclone turbo charged. It has a full tank of gas and is getting spark but wont start


    step one- need silence- insert key - turn to on- not start- listen for fuel pump whine- if here nothing- check 1- fuel pump fuse
    2- fuel pump wiring (double check your ground!). if pump still does not make whine(pressurizing) your pump is gone. an intermitant pump can be a ground issue or a bad pump most times....

    May 08, 2012 | Chevrolet Chevrolet Cars & Trucks

    1 Answer

    My 1995 Chevy G20 van won't start most of the time. The engine cranks and whines, but never starts.


    I would be looking for fuel first a faulty fuel pump. second seeing if you have spark, bad wires or plugs or even distributor, timing could be out

    Jan 29, 2012 | Cars & Trucks

    1 Answer

    Will not start. 1995 astrovan will not start. engine turns over as normal, sounds like it is starving for fuel or spark.


    pull a spark plug wire off at spark plug put another plug in wire lay plug and wire against metal of engine and turn motor over looking at plug for spark. as for pump noise turn key on not to start and listen for whine noise for a couple seconds. if hear whine that is your fuel pump noise. not a clear filter canister about under drivers seat on inside of fram

    Sep 07, 2009 | 1995 Chevrolet Astro

    1 Answer

    1988 buick lasabre


    Nate, I'm not sure what you mean when you say,"I can get it to whine but not turn over. The starter is trying to get it to turn, but I don't think it is getting any gas".

    Separate and aprt from not getting any gas is the fact( if I understande you correctly) that the motor is not being cranked by the starter motor. You say "it whines". You are referring to the starter motor, right? the starter motor should not "whine". If this is what's happening by guess is the Bendix spring in the starter motor is broken. The bendix spring is a heavy spring that is mounter on s worm gear in the starter motor. When you go to start the motor by turning the key the starter motor turn and the spring travels down this worm gear and engages tthe geared flywheel and cranks the engine. As soon as the engine starts the flywheel is now turning the bendix spring faster that the starter motor and the spring kicks back to its original position. If the spring is broken it never engages the flywheel and the engine wont crank.
    The fact that you say the starter "whines" is what I would expect you to hear if the starter is at fault.

    As far as no fuel flow there are 2 ifs: if you have an electric fuel pump, then there is a problem in the fuel flow. If you do not have a electric pump then the fuel pump runs off of the engines motion and since the engine is not cranking, the pump is not pumping and the fuel is not flowing.

    Anything else you can add before we conclude that the starter has to come off?

    Loringh


    Oct 15, 2008 | 1988 Buick LeSabre

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