Gas gage going crazy

[Travisbsmith]

Gas gauge going crazy

I recently put intake gaskets on my 1996 tahoe. I had a new alternator laying around so I changed it. My gage would move a little when I would come to a stop, it would drop down some, not much, and when I accelerate it would go up a little. Since the intake gasket, and alternator change it is going crazy. When I come to a stop it goes to up past full most of the time, and it will have about a quarter of a tank of gas in it. Does anyone know if the alternator could be making the gauge spaz out. Thanks in advance for all input

 

[junkie4mud]

good luck fixing that i have the same thing going on. It goes lower then "E" then back up the 1/2 tank when i drive her.

junkie4mud

 

[ChrisElmore]

most likely its the sending unit

 

[Zipper369]

I know my gas gauge acts a little strange. It has the "hummingbird shake" but it still reads somewhat accurately, I think. I can get in and start it up, and reads, lets just say a 1/4 tank. By the time I get out on the road, it's gone up to almost a 1/2. Is it just me, or do they all read a little lower before you start driving?

 

[Travisbsmith]

It was fine until I put new intake gaskets on it,and had a newer alternator laying around,so I put it on the truck. I am getting it back from the transmission shop today, so I'm gonna put the old alternator back on it, and see what happens

 

[justimagination]

Time for a new sending unit as B4 mentioned. AC Delco is the only way to go, and don't forget the in-line filter as well.JMHO, Good luck
david g.

 

[Travisbsmith]

I put a Delphi unit in about a year ago when the original pump failed

 

[Travisbsmith]

Update ...... Had to put another sending unit in, works great ..... for now lol