Hi,
Is the check engine light staying on or flashing while the engine is running? If it is, I would start by having the computer scanned for diagnostic trouble codes.
Here is a link showing how the entire controller area network is checked:
https://www.2carpros.com/articles/can-scan-controller-area-network-easy
If you don't have a scan tool, oftentimes a parts store will check it free of charge.
Next, the idea of a delayed start leads me to think of a possible fuel pressure issue. Have you checked anything related to the fuel system? If not, that is something other to consider. You will need a fuel pressure gauge to check, but most parts stores will lend one to you.
Here is a link that explains how that is done:
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
Let me know what I can do to help or if you have questions.
Take care,
joe
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Friday, July 7th, 2023 AT 8:34 PM