‘66 Barracuda Fuel Gauge Pegged!

clifftt said
I installed the RT-E regulator and bench tested with a cheap Chinese sender (see my post #13 with a picture). As I moved the sender float, the gauge would move up and down. The back of the fuel gauge has thin dense cardboard to prevent it grounding. It was fit snugly between the posts.

I have the cluster loosened and ready to come out again. I might try what Bob said in post#20, to use a separate wire outside of the car from the sender straight to the gauge to see what happens. I’ll double check to make sure the cardboard is in place behind the fuel gauge, too.

You can isolate the limiter with electric tape. It will stay where you put it. It needs to cover all the metal including the 2 little bent tangs that hold the board. The switched 12 volt wire should be moved from harness connector to the regulator. If you simply tapped the wire or something similar, you still have 12 volts going into that gauge. You have to be careful with how/where you mount the regulator also. If on the back of the panel, it cant sit on top of a copper trace. It could short that trace to ground. Post a pic of your completed assembly?