Tale of the faulty fuel gauge!!!
Based on the chart below that I copied from another thread, we can see what Garry is describing. At 9 gallons (about 1/2 full) the mopar sender is about 28 ohms and the aftermarket is about 48 ohms.
That means that at a half tank of gas, the aftermarket sender will read about 3.5 gallons, or less than 1/4 tank.
The graph below shows it visually. As the resistance goes up, the gauge goes down. The blue line goes up much faster than the red line.
If you look at where the blue line crosses 63 ohms (empty on the mopar sender) it would imply that the aftermarket sender would read empty on the gauge at 5-6 gallons left.
Based on the chart below that I copied from another thread, we can see what Garry is describing. At 9 gallons (about 1/2 full) the mopar sender is about 28 ohms and the aftermarket is about 48 ohms.
That means that at a half tank of gas, the aftermarket sender will read about 3.5 gallons, or less than 1/4 tank.
The graph below shows it visually. As the resistance goes up, the gauge goes down. The blue line goes up much faster than the red line.
If you look at where the blue line crosses 63 ohms (empty on the mopar sender) it would imply that the aftermarket sender would read empty on the gauge at 5-6 gallons left.