Question about 2008 Dodge Nitro 3.7

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Is a fuel pump that runs even when the key is off a sign of failure

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  • Dodge Master
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Check the fuel pump relay possibly stuck or still being energized by ECM or short. Are you sure its not the power antenna assembly making the noise?

Posted on Jan 01, 2014

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Posted on Jan 02, 2017

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2012 suzuki sx4 fuel pump on with ignition off


very dangerous.
and is caused by a double failure
the Fuel pump relay is bad and the power to it is stuck on.
very bad.
my online FSM has no schematics. its too new.
you need a real fsm or get help;
$4 day pass, see the pump, relay and power feed there.

https://suzukipitstopplus.com/Products/10305-2012-sx4-service-manual.aspx

these new cars with 14 computers are hard to diagnose.
the PCM sends a command to shut down pump, and can be ignored
the conundum is, did it send the command, did it get lost on the CANbus network or was the relay module asleep.
welcome to the digital age....

on the older Sx4, the key switch (ign. key) kills power to the pump relay and even if the relay welds closed, the pump will go down
key off, on new cars, even the key sends out commands. on the network (canbus)
im trying to build some cheap tools for this.... to see if the commands
were even sent.
is your car still under warranty? Suzuki is chapter 11.. so finding
dealers is a problem, in usa and now canada.
id sell it. but that's me.

Feb 06, 2014 | 2012 Suzuki SX4 SportBack 4dr Hatchback...

1 Answer

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

1994 Lincoln Town Car Fuel System Failure?


Is the fuel pump relay getting power from the EEC relay when you turn the key on ? And then is the fuel pump relay sending power to the pump ?

Jun 09, 2013 | 1994 Lincoln Town Car

1 Answer

I have a 93 K3500 with a 454. Truck was running fine, started no problem, ran great. Driving the other day, turn the corner and the engine quit. Cranked the engine, fired up for 2-3 seconds then quit, ...


Before starting the engine, the fuel pump should only run for a few seconds when the key is first turned, to pressurize the fuel system. Even though the pump appears to be running, you may either have not enough or too much pressure for the engine to keep running (fuel pump or pressure regulator). I think it may just be a coincidence the engine quit while turning a corner, but the gas in your tank may have been so low it sloshed away from what is likely a very old pump, starving it and causing it to failure.

Jul 03, 2017 | 1993 Chevrolet C1500

1 Answer

So my 1995 Rodeo will sometimes not start. When I turn the key to the on position, the check engine light comes on and I can hear the fuel pump pumping, but every so often, the pump doesn't pump and the...


First things first...Rewiring the fuel pump will only put a "Bandaid" on whatever the problem really is and will most likely create a situation where wires are draped across places where they shouldn't be, causing all kinds of future electrical problems. I have had to clean up that type of mess too many times.That type of "shade-tree" repair makes proper diagnosis and repair of a vehicle nearly impossible, even by a trained technician. My recommendation: DON'T EVEN THINK ABOUT IT!

OK, Now that I have my preaching out of the way...
The check engine light is supposed to come on every time you turn the key to the "On" or "Run" position before starting the engine. This is for a "bulb-check" just to let you know that it is not burned out. It should go out immediately after the engine starts and should stay off the entire time you are driving the car. It is not any type of indicator to let you know that the fuel pump has run. If your check engine light is not coming on every time you turn the key to "On", then there is probably a problem with your ignition switch or your ECM Main Relay. Either of these can cause an intermittent failure of the ECM to power up, a)d thus, not turn the check engine light on. Failure of the ECM to power up will also cause the fuel pump to not run because like the check engine light, the fuel pump is controlled by the ECM. (Rewiring the fuel pump will not make the engine start if this is in fact what the problem is.)

I have also seen many fuel pumps that run when they want to. You could have a bad fuel pump, but refering to your statement about the check engine light, I would guess that the fuel pump is not the main problem or even if it is a problem at all.

Dec 29, 2010 | 1995 Isuzu Rodeo

1 Answer

2002 blazer crank but wont start


2 things that you have to check on no starts every time. Spark at spark plug and fuel. Turn key to run position and listen at gas tank for fuel pump to run you should hear a whining noise. This will only happen for 3 to 4 seconds then it will shut off until engine starts. You can turn key off then to run every 3 to 4 to listen for fuel pump. You may hear the relay click off in engine area even if pump does not run. Fuel pump failure is pretty common. If pump is running pull spark plug out or put a spare plug into spark plug wire and have someone crank engine set plug on engine and watch for spark. This will give you a starting point. Hope it helps.

Mar 30, 2010 | 2002 Chevrolet Blazer

1 Answer

2001 chevy blazer, have replaced fuelpump,filter,fuel pump relay.Fuel pump does not run everytime key is turned to start.When pump does run the engine runs for a short time and quits.When I try and...


when replacing fuel pumps on alot of chevys its recommended to replace the harness also or you can have repeated fuel pump failures. Do a search on,, why repeat fuel pump failures;; and you'l have some info to go on.

Nov 26, 2009 | 2000 Chevrolet Blazer

1 Answer

1995 Chevy 1/2 ton v6 starts then dies


The fuel pump inside the fuel tank might have a bad armeture or brush failure. Have someone crank the engine with the key inside the vehicle while holding foot on brake pedal and e-brake on.
Take a large hammer and bang on the bottom of the fuel tank while the engine is cranking. This should wake up the pump. This is only a temp. fix if the truck starts. That was a sign that the pump has failed and should be replaced.
Good Luck.

Sep 08, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

90 corolla efi problem?


Classic fuel pump failure, Efi fuse runs the fuel pump now its open and it won't start. With it cranking and not starting add a little fuel to the air inlet and if it (flashes off ) ( runs a few seconds ) there's no fuel and the fuel pump is the most common cause. The pump is in the tank and unles s you feel that you as good as any pro mechanic and have the experience then let a pro do the work as the danger is high even for a pro.

Aug 19, 2009 | 2004 Toyota Corolla

4 Answers

Fuel pump location 2001 pontiac grand am


The fuel pump is in the fuel tank.Sit in the car.....turn on the ignition switch to run.....listen very closely to the rear of the car...or have someone kneel down by the back wheel.....you should hear a "prime cycle"......the pump running for 2 or 3 seconds if the key was off for 15 seconds before trying this.If you hear silence you most likely need a fuel pump.Before pulling the tank down....check for power on the gray wire at the fuel tank connector just ahead of the rear axle under the car.Check for power with a test light that will last for 2 to 3 seconds as you turn on the key to run.Power means you really most likely need a pump.No power means you may need a fuse or a fuel pump relay.

Aug 11, 2009 | 2001 Pontiac Grand Am SE

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