Fuel guage problem(probably my fault)
 

So a couple years ago I did a 4x4 conversion on my 88 Suburban. At the same time I yanked the stock TBI engine and trans and swapped a carburated 350 out of my 4x4 parts truck. Well when it came time to "hot wire" the in tank fuel pump I accidently put power to the wire for the guage instead of the pump. Once I realized the pump wasnt running I switched it and spliced the guage wire back together. Now this burb had a perfectly good working fuel guage before I tore it down and rebuilt it, but since the rebuild the guage does what ever it wants. It usually stays at the 1/4 tank mark but will occasionally decide it is going to go to empty or half tank with no real reason to move.... So my question is, did I hurt something in the sender when I put power to it or did I lose my operational guage when I got rid of the TBI?

Re: Fuel guage problem(probably my fault)
 

Nobody?

Re: Fuel guage problem(probably my fault)
 

My fuel gauge goes all over the place in my '83. I'm pretty sure it is either my sending unit or a bad ground at my gauge. Maybe you didn't get a good ground back together when you fixed the wiring to your gauge?

Re: Fuel guage problem(probably my fault)
 

Short the gauge wire to a good ground at the front of the tank (I think it is pink on my 91) and the gauge should go to "empty". With it disconnected it will normally go to the 3'oclock position....way past full. If it does that then it is probably your sending unit. If not could be the gauge or both.