Originally Posted by ByThaBay

Best thing to do is to datalog the car when the issue is happening and look at the various parameters. This should help you narrow down the issue. I don't think it's a fuel pressure issue, because the fuel pressure will drop to zero overnight by the time you're ready to start the engine and you're not having issues with that.

If you need ecutek data logging hardware or licensing, PM me I can get you set up.