If you can get access to a basic scan tool that can read live engine data along with any potential trouble codes stored, that would help. For example if you see no rpm signal on a scan tool while cranking, then you know theres an issue with the wiring or crank sensor.
And have you checked that the coils and injectors have power with the key On and cranking? If it sat for awhile, rodents love to chew on wiring, due to the taste of a chemical in the insulation so check the wiring harness for broken wires, or ground wires that are not making good contact. Did you check more than one coil for spark?
Im not sure how much equipment you have for testing, but also check for the Check engine light come on when you turn the key On? If it does not, then the PCM is not powering up, that can happen for multiple reasons.
Here are some guides to help and we can pull up any wiring diagrams needed.
https://www.2carpros.com/articles/no-ignition-spark
https://www.2carpros.com/articles/how-to-check-a-car-fuse
https://www.2carpros.com/articles/how-to-use-a-voltmeter
Thursday, October 2nd, 2025 AT 1:48 PM