Skip the auto shop - Our mechanics make house calls

Q: I installed a new fuel sending unit the gas tank is full and it shows empty when u take all gas out it shows full what could it be

asked by on

I installed new fuel sending unit an put full tank of gas in it an it shows empty when you take all the gas out it shows full its one of the sending unit that comes with the wire you have to spice what could be it be thanks

My car has 130000 miles.

It sounds like you put in an incorrect sending unit or it is defective and needs a replacement. The fuel sending unit will vary resistance from low to high resistance controlling the gauge. If the signal from the sending unit is opposite of what it should be then the gauge will work opposite of the way it should. I would recommend replacing the sending unit and make sure the new one works opposite of the one you have now. You may have to get the correct one from the dealer since sometimes the aftermarket ones do not always work. You can connect the sender and check it before installing it back in the tank.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  • Home
  • Questions
  • I installed a new fuel sending unit the gas tank is full and it shows empty when u take all gas out it shows full what could it be

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Replace a power steering pump and the fluid boiling out the pump and still leaks.

Hi There, It is very uncommon for power steering fluid to boil. It may be more likely that the fluid may have air bubbles in it as a result of changing the power steering pump. Air bubbles in the system...

Q: 2014 Toyota Corolla Fuel Odor

This may be related to the fuel tank purging system. As you may know, all modern cars are equipped with an Evaporative Emission Control (EVAP) system. The EVAP system prevents fuel vapors from the fuel tank from escaping into the...

Q: right side steering pulls to the right

From what you described about your 2000 Ford Focus, you may have a bad tie rod end or a bad tire. Have the front end inspected and checked for damage. A vibration is most likely a tire or bearing, and...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...