Bad Fuel Gauge?

[VetteVet]

[quote=gringoloco;5813949]Yes, I set up the new sender arm to be on the bottom of the tank at 0 and at the top at 90. Not sure if this is what you're asking?

Yes that was what I was thinking.

Grounded the fuse panel. Gauge settled spot-on the 'E' mark. Remove the wire and it pegs past full. Seems normal to me..

Well that is the normal thing to happen. I am grasping but the float sometimes gets fuel inside it and being heavier it will read less fuel in the tank and the gauge will show less fuel than it actually has.

Being an oversized tank if it was longer than the stock tank then you would be able to put more fuel in it before the gauge registers. Do you have a vehicle with the stock tank you can use the sender in for comparison?

[gringoloco]

Originally Posted by SCHRUMGMC

Well, I thought you had a Bad Fuel Gauge.I wanted to teach myself what things could go wrong for when I get a Truck

I still think it may be...

Originally Posted by VetteVet

Well that is the normal thing to happen. I am grasping but the float sometimes gets fuel inside it and being heavier it will read less fuel in the tank and the gauge will show less fuel than it actually has.

Being an oversized tank if it was longer than the stock tank then you would be able to put more fuel in it before the gauge registers. Do you have a vehicle with the stock tank you can use the sender in for comparison?

You mean swap the gauge? Yeah, my truck has a stock style Blazer tank and sender w/ stock cluster. May have to do some comparison readings between the two trucks with the DMM then possibly swap clusters if I have to. Was hoping someone had seen a failure like this before, to save me the trouble of swapping everything around...

I'm still thinking 42 ohms at the fuse box should equate to somewhere around the halfway mark on the gauge?