Okay, so here is the deal. I am fuel injecting a 289 using 5.0 liter parts. Fox lower and sn95 upper. Fox IAC and 2000 Explorer 5.0 TPS. The TPS is different from the fox TPS. I've ran the wires. The reference voltage is 4.9V. The return Voltages is 4.9V. And it should not be. The input reference has not in-between voltage. Is either wide open or closed, and it won't allow the car to idle. Any help would be appreciated. The fox wires are black, green, and Orange. The explorer wires are grey with red, brown with white, and grey with white. The are align properly and the sauder connections are good. Are there grounds that need to be grounded anywhere in the harness in order to attain the appropriate voltage?