ISX to x15

[Bengy88]

In a perfect world they would have used the harness and ecm from the engine that was originally in the truck as there are a few of us that can make them run 100% safely that way. When you start swapping the engine harnesses etc in an attempt to make one run there are always issues like this. Specifically with coolant level sensors and throttle position sensors. It can be made to work but requires a ton of research and comparisons both ways and you usually end up re wiring the accelerator and changing the tps sensor.