Sensor plug color codes?

Hello, it's impossible for anyone to help you without hands on assistance. "Replaced engine" -- what engine did you procure? Original Nissan parts? Used parts? Non-factory remanufactured parts? How can you even be sure the engine you have is an identical match to what you need? It's more likely it's the wrong application and requires some kind of undesirable modification. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops