Question about 1994 BMW 3 Series

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The fuel gadge is constantly showing empty with the reserve light on. how can i fix the problem please

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This is a common problem it is poor connections to fuel gauge tank sensor check wiring and connections and repair as necessary

Posted on May 28, 2010

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1 Answer

Water reserve bottle is emptying and engine is getting how


flushing a radiator is a waste of time and money as blocked cores do not flush. Have a pressure test done on the coolant system and check for external leaks. have a compression test done to check for head gasket and cracked head. Have a flow test done on the radiator and if shows signs of blockage replace the radiator .. Always fill the radiator at the radiator cap and not the reserve bottle. The reserve bottle water will not go down until the engine coolant starts to cool so if it is going down when the engine is hot then you have a bad leak in the reservoir bottle.

Jan 07, 2014 | 2000 Oldsmobile Intrigue

1 Answer

Fuel guage always shows empty


It sounds as if the fuel tank sending unit is faulty. This is a small float connected to a variable resistor on the fuel pump/sending unit assembly. Unfortunately this assembly is fairly expensive (over $300) and the fuel tank may need to be removed to replace it.

Aug 23, 2012 | 1999 Isuzu Rodeo

2 Answers

I have 1990 Mazda Protege Se. Gas fuel guage is showing empty but about 2-3 gallons gas is in tank. When I fuel it up to full, gas guage showing full again. What's the problem? How to fix?


the extra fuel is "reserve" to get you to a fuel station... this is normal. If you were to run it completely out you will damage your fuel pump, fuel is used to cool the fuel pump. Soo... DON'T run it so low!

Feb 14, 2011 | 1990 Mazda Protege

1 Answer

Gas gadge doesnt move...how do i fix?


if your gas guage is readin full it is ground problem,if the guage is readin empty,it is in the tank as in the guage unit which is a separate unit beside the fuel pump

Jan 06, 2011 | 1992 Honda Accord

1 Answer

Fuel gauge stopped today,was on empty and put in 10.00 fuel light still on


because the reserve holds more than 10euros worth of fuel .

Apr 19, 2010 | 2003 Volkswagen Golf

1 Answer

I filled up my 2005 trailblazer ext v8 and the fuel gadge says im empty


GM has had issues with fuel level sensors (in the tank) and instrument clusters. Are the rest of your gauges working correctly? If so then you will need to install a level sensor. Good Luck

Jun 19, 2009 | 2005 Chevrolet TrailBlazer

2 Answers

I ran out of gas with 1/8 showing on the gauge (the light didn't come on). Dealership said the pump for reserve fuel was out so it couldn't pump gas from the reserve section of the tank to the main...


I don't always agree with the dealership and there innovations. It does sound like you need a fuel pump. the sock or p/u tube, at the bottom of the pump has come off. GM fuel pumps are usually good for 100K+ miles but unless you can verify that the filter inside the tank is still doing its job. you may compound your problem by sending unfiltered fuel to your injectors. Good luck.

Apr 26, 2009 | 2003 Chevrolet Suburban 2500

1 Answer

1989 Saab 900 low level fuel light


You don;t say whether the fuel gauge is reading accurately, or whether it's always on empty. If the gauge is always showing empty, it's most likely a problem with the sending unit in the fuel tank. Check the resistance across the two terminals of the sending unit.

On a C900, the fuel sender level unit is separate from the fuel pump and located on the right side top of the tank, accessible by removing the trunk floor lift up panel (the pump is located on the left side top of the tank.
Possible problems are: electrical line off or broken, float not working (it's fairly delicate); or gauge not working.

Test the resistance of the sending unit with the lines disconnected, the resistance should be 2.6 to 3.8 ohms full tank, 63.3 to 67.5 ohms empty tank; and test for voltage across the top of the sender unit, if no voltage, that's likely the problem!

If the gauge is otherwise reading accurately (showing 'full' for a full tank, etc) then the problem is likely a gauge malfunction and can be simply replaced.

Good luck!

Saabreur

Jul 10, 2008 | 1989 Saab 900 4 Door

1 Answer

Calibrate a fuel gage (gas)


Assuming you don't have some kind of Space Shuttle technology to work with, the best thing to start with is an empty gas tank. When you install the sending unit the little float will be hanging down and the gauge should read empty. You can do some minor adjustments to the float while you are monkeying around with it so that, for example, "Empty" is not empty. This way even if the gauge is reading empty you will know that you have a few gallons left in there as a back up reserve so even if you are reading in the reserve range that you know you will still have a couple gallons left in the tank when you hit the big "E".

May 15, 2008 | 1987 Chevrolet R10

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