Not knowing your fuel level sender ohm range or variances in manufacturing can cause troubles when setting up a proper fuel level gauge with an aftermarket ECU. This video explains how to use analog voltage input within the Haltech iC7 to get an accurate reading of fuel level from empty to full. AVI #4 has a pull-up resistor built in for this purpose. It’s also good practice to use a sensor ground from the iC7 to the ground of the fuel level sender as well.
