Sometimes we can restart it with little to no issues and sometimes it takes 20-30 minutes to get it to start again. It is cranking and the voltage reads ~ 14 volts when running so I don't believe it's the battery or alternator causing the issue.
I put a fuel pressure gauge on it and I'm getting around 58 psi with the key on but engine off and it stays around 57-60 psi with the engine running. Never drops below 57 psi even when it dies so I don't believe it's the fuel pump.
I've gone out and bought an xTool D7W to try and pin down what's going on. I did get a "System Too Rich Bank 1" DTC while the car was sitting in the driveway idling.
I have replaced the air filter. I recorded some data while the car was sitting in the driveway with the xTool. Thought that the HO2S 1 wildly swinging between like 25mV to 800mV was an issue but after doing some more research that is normal.
I was going to drive it and record at the same time until it dies again. XTool allow me to pick up to 8 fields to record. Which should focus on? What else can I test or do to try and figure this out?
Saturday, June 28th, 2025 AT 7:18 AM