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Gas gauge not reading right

Gas gauge is not showing accerate readings the other day i ran out of gas... tried to find a sending unit by its self but they only sell the whole pump assembly for my car... is it possible if i can buy a sending unit for another car and just pull mine off and replace it with the new one and it still work and if you know a compatible or simular make that i can do this with please let me know

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1 Answer

No---- The pump & sender is a complete unit

Big $$

Posted on Nov 29, 2012

  • vada6878 Nov 29, 2012

    thanks again for the quick reponse

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you might wanna check the contact on the floater i had that problem so i just bent the contacts closer and that worked for me

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probaly a fuel pump its common for vehicles to do that the best thing to do next is a fuel pressure check to verifiy its the pump

Posted on Apr 15, 2009

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SOURCE: Fuel Gauge Problems

Hey there. Well, I had the same problem on a 1999 Isuzu Rodeo. I thought I'd take the easy out and just replace a fuel sending unit. Don't waste your time. Swap out the entire fuel pump. Go to your favorite autoparts store (Autozone) and ask for them to price the fuel pump. There will be options, get the part number for the cheap one ($80 Airtex, I got mine from a place in Miami). Look up the part number on ebay and buy it for about $80 complete. Spend the money and get a new fuel filter from parts store as well as a Haynes repair manual for the truck. Follow the instructions for fuel pump removal in section 4. You should have a degree of confidence on auto repair or take is straight to a reputable shop. You do need to do some very important things (relieve fuel pressure, drop the fuel tank with the truck on high ramps or jack stands, etc.). This is NOT for the novice. Otherwise, expect the task to take 4 to 6 hours if you don't have a lift. A shop should charge 1 1/2 hours labor and cost of the pump - you need to ask yourself what your time is worth.

Good Luck
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Posted on May 01, 2009

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SOURCE: gas gauge reads empty but tank acts like it's full

I also have a 04 with a 1.8L. same problem. I took the fuel regulator off. It is a black box behind the rear tire under car. It only has 2 bolts to take off. After that there is a couple of vent hoses from the tank going to this box. Unplug them and 1 electrical connection. The electrical connection and one vent is connected to a T connection on the box that you can unplug by twisting on the T. Take that T off and look inside where you unplugged the hose on this T. There is a spring and a little plunger inside this tube. The plunger gets stuck. I took a little screw driver and some PB blaster and worked that plunger back and forth a couple dozen times and it unfroze. Put it back together gassed up just fine. I did not look but I was told regulator can be replaced for 200$. But a can of blaster is cheaper.

Posted on Jun 10, 2009

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SOURCE: 2001 chevy silverado 4.8 gas gauge not working properly

Fairly common problem with GM vehicles. The sending unit in your tank has a small circuit board that an arm is attached to which moves up and down according to your fuel level. This circuit board and arm are not making good contact. Unfortunately the only good solution is to replace this part.

Posted on Oct 28, 2009

Testimonial: "thought probably that was it but better off replacing whole unit .i was for for gauge proplem thanks. "

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2 Answers

Gas gauge only working sometimes, i have replace the whole fuel sending unit for the left side (driver side) (this car has two one sending unit and a right side pumper) could it be grounding issue?


Mason, Try a cluster self test, press and hold the odometer reset button, then turn the key from off to on. Keep holding the button until the test starts, all gages will sweep and warning lamps will light up. if fuel gage doesn't move, then you've got a cluster problem. if it does move, then you'll need to test the level sensors and rest of circuits.
Check fuses/relays and loosen and retighten any grounds you see to get fresh good contact.
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

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Well friend, you know the dash gage is good cause that was a proper test procedure. Since your not getting proper readings it has to be the sending unit. Pull it apart and clean the rheostat with a pencil eracer and light pressure, the assemble it and try it again. if still nfg, replace the sending unit. they're cheap from any auto parts store.

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Fuel gauge on my 2004 f250 will suddenly drop to empty and it changes the ambient temperature gauge to a really low temperature. It will some times change to the right fuel level after I turn it off and...


IT IS SIMPLE YOU HAVE A DEFECTIVE FUEL LEVEL SENDING UINT INSIDE THE GAS TANK. REMOVE THE GAS TANK AND REPLACE THE SENDING UNIT TO CORRECT THE PROBLEM, ABOUT A 4 HOUR JOB WITH A HELPER.

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It sounds like the sending unit has a dead spot on it causing it to read inaccurately. The tank would have to be dropped and the sending unit replaced. Check out this page and illustration to better understand what's going on. "How a fuel gauge works"

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perform a master oil pressure test. this is done by removing the oil pressure sending unit and installing a oil pressure gauge. if the reading on the test gauge is ok, the sending unit needs to be replaced. if the pressure reads low on the test gauge, there may be excessive bearing wear or you may have worn valve guides. good luck!

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HI, MY FUEL GAUGE WORKS BUD ERRATIC, I MEAN IT DOESNT SHOW THE CORRECT AMOUNT OF GAS LEFT. WHAT COULD BE WRONG? THANKS.


In a case like this, the culpret is most likely the fuel level sending unit, which is located on the fuel pump in the fuel tank. In most vehicles, the pump and the sending unit all come in one assembly, which means in order to get a correct reading on the gauge, you'll need to replace the fuel pump. And actually, considering the fact that you have to drop the fuel tank and remove the pump anyway, it's just good measure to change them as a set.

I hope this helps! :)

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05 grd caravan fuel gauge showed quarter tank and


The float sending unit is messed up and don't know now much gas is in the tank. The float may be stuck in a higher position showing more gas, in reality the gas level is way below. Try using a rubber mallet and tap on the gas tank near the fuel pump. It may help free up the float.

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My 01 bonneville oil pressure gauge is showing 120 and my gas gauge is all over the place


HI, the oil pressure sending unit may be malfunctioning at this point. this will cause erratic readings. if your oil level is proper and there are no apparent oil leaks, you will need to replace the oil pressure sending unit. this will fix the erratic oil pressure readings.

Concerning the gas gauge. this device also has a sending unit that sends the correct fuel level reading to the gas gauge via wire transfer. this sending unit is located and attached to the fuel pump assembly inside the gas tank. replacing this device will fix this issue as well.

Please rate and god bless:)

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1 Answer

Fuel gauge is not reading


to the right , i am assuming to the "full tank" reading. am i right?

if i am right, the wire from the gas tank is sending a full tank signal what ever the content of the tank.

meaning the wire is shorted to ground.
or the sending unit is faulty. there is a short to ground reading between the sending unit.

you can test which one is faulty. remove the wire from the sending unit. observe the gauge. if the gauge would go to " empty" then the culprit is the sending unit. if it stays on " full tank", then the wire is faulty.

WARNING: GASOLINE IS EXTREMELY FLAMMABLE. BE VERY CAREFUL IN HANDLING NEAR THEM.


tnx 4 using fixya,

drcool

Sep 23, 2008 | 1997 GMC Sonoma

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