Question about 2005 Pontiac Grand Prix

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Humming noise from fuel tank

I have a humming noise that sounds like its coming from the fuel tank my car runs fine no spitting or sputering just this annoying noise any ideas ?

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Fuel pump is on its way out.replace it soon.

Posted on Dec 02, 2012

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Have fuel pressure tested. Pump may be getting weak, filter plugged, or not likely but possible, hole in pick-up tube in tank. Make sure you try to have it tested when lower and spitting and sputtering.

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The poor performance of the car makes these faults to come up and undermine the working of the engine. So to start off we need to check from the fuel tank. Check if the fuel contains impurities and specially water. If so this can come up with the pumping when the tank gets empty and produce misfiring, splutter and jerks. So a check on the fuel filter will confirm this as it will be seen, if so remove and clean tank and change the filter. We then come to the fuel pump/carburetor as the fuel mixing and pressure is determined in this section. You need to have the pump calibrated if the pressure at the injector is low.

Then we must check with the electrics. The spark intensity is most important .Remove all plugs to check gap and condition of plugs. The black plug indication will confirm that the performance is bad whereas a fully fired plug without deposits must be the ideal view. Check the HT coil and the HT wires, if the intensity is bad this must be swapped and checked to confirm. DO NOT CHANGE any part without a confirmation by trying with a replacement from another vehicle or friend. Finally the LT trigger to the coils must be checked be it from the platinum points or an electronic ignition unit. The voltage of the trigger must be high to give the best HT output.

Now use a strobe to check the Timing on the engine. Adjust if needed to see the TOP DEAD CENTER-TDC- mark. If there is valve noise make sure that the tappets are set properly so that the valves seat firmly for the best compression. Also check compression of engine if there is imbalance on the engine or reduced power.

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Truck has 305 motor fuel injected idles fine when in drive barely exelerating it spits and sputers and sometimes dies but when i get into the exelerator a litle bit it doesnt do it


if it is an HEI distributor remove the cap and rotor there is a module under the rotor take out the two quarter inch screws and unplug it take it to your local parts store and have it checked that is the module that controls the injection rate,if it is not HEI then do an injector cleaning,also try running a tank full of high octane gas through it the injectors sound like they have gunk built up in them,hope this gives you a place to start

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My 98 chevy malibu makes a howling noise. it does this driving down the road and also setting still while the engine is still running. it sounds like the noise is coming from the gas tank. could it...


if its coming from the gas tank area the only thing i can think of would be the fuel pump..they make a little humming sound, but if its making a howling sound it might be going bad. does this help?

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Ran out of gas in 98 explorer and now wont start with gas was running fine


Check the following: Turn the key to the on position (so the dash lights go on, but the engine does not crank) and listen for a 'whirring, or humming' noise coming from the gas tank. This would indicate the fuel pump is working. You should hear this for about 5 seconds. No sound, you may have a bad fuel pump. The gas in the tank keeps the pump cool, if it overeats it can fail. Change the fuel filter. It is possible you just drew in sediment from the bottom of the tank, and it is plugged up. If this doesn't fix it, let me know so I can help further.

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if you have an electric fuel pump that would explain the hum. unhook your incoming fuel line and blow the line clear, sounds like you've got some junk in your tank.it'll build up on the screen in the tank then fall off (at least partially) when your making turns or hitting bumps or holes. next time it's only got a gallon or so of fuel i'd drop the tank and check the pickup tube inside. sux but that's the only way to get to it. while you've got the tank off and out from under the jeep, might as well clean it out real good and replace anything inside (usually the screen) that doesn't look right, dirty etc. wouldn't hurt to run a bottle of fuel system cleaner in the next full tank of fuel either. preferably as soon as you put your tank back. good luck

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Go to Wal-Mart or any Auto Parts Store and Get a Can of B12-Chemtool Fill your Gas tank and Put into the Fuel tank. This will clear up any Contaminants in the Fuel. Sounds like you might have a Little Bad Gas.

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1 Answer

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sounds like you may have to replace your fuel filter is it origional or have you replaced it before ? if the fuel pump is screaming then there is usually a restriction in the line sometimes caused by dirty fuel filter , its also possible that the electric fuel pump is on its way out they will screem when they are ready to retire first replace fuel filter and monitor the sound if it comes back after replacing the filter then you will need to have a pump replaced .also check the level of fuel in your tank when you hear the noise sometimes the level of gas in the tank drops leaving the fuel pump unsubmerged in the fuel making it easier to hear the noise follow me . replace fuel filter and diagnose the sound from there thanks for using a fine web tool like fixya

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Ran fine then next day all went to /


that sounds correct and its probably electric and in the tank. turn the key to the start position then listen for a small humming noise coming from gas tank if theres no sound then thats most likely the problem.

Jun 10, 2008 | 1990 Chevrolet Corsica

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