Fuel gauge not working properly

HIDDEN1

MEMBER
2001 DODGE DAKOTA
3.9L
6 CYL
2WD
AUTOMATIC
195,000 MILES

I'm having an issue with the gauge. Some startups it measures just fine on fuel, other times it never engages.
I stopped and put a gallon in after it was not moving and then at next start it moved to correct reading.
Is there junk in the tank maybe and would something like marvel mystery oil help lube it any?
I do not want to have to pull that pump.
Thanks

1 Reply

SQM

MECHANIC
6,383 POSTS

Hello,

It sounds like the issue could be a faulty fuel level sensor. The fuel level sending unit consists of a float and a resistor panel that the float attaches to. With the motion of the float the resistor sends signal to the gauge for the fuel level.
It is possible to have intermittent connection on that resistor, leading to the incorrect fuel level.
In order to access the level sensor, you will have to remove the fuel tank to get to the pump.
Another possibility is a faulty fuel level gauge itself, which is part of the gauge cluster.

I have attached diagrams below for your reference.

Let me know of any questions.
Thank you.

https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump

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