I just completed a motor swap on an 08 Altima 2.5 and now I’m getting a crank no start problem. I have double checked all connectors on wiring harness to make sure they are all tight. Checked ground wires. Swapped crank sensor from new motor with one from old motor (surely they can’t BOTH be bad, can they???)
I am pulling my hair out with this!! Can anyone give me some direction on where to go from here??

I got it.

What was it? I swapped mine in my 09 and crossed my fingers and it popped right off. I had a misfire on a coil pack but no biggie. I installed an engine that matched the mileage of my extended warranty cvt. So even though my odometer says 139k the drivetrain has 43k. I just bought a 2021 so I’ll save this for my soon to be driving son. Still a great car with zero rust and all the steering and suspension components replaced along with new front wheel bearings.