I had this happen to me twice now at my last two events and it makes no sense to me. 04/17/21 I ran an all day on Saturday (4 sessions) and car ran fine. 04/18/2021 Sunday morning went out for two sessions and the car ran strong. drove to the grid for the Q-Race and had to shut down for 15 minutes due to track cleanup. Tried to start the car without and with jumper and it just spun over very quickly. Towed back to the paddock got out tried to start it again and it fired right up. shut it down got strapped back into the car and it just spun over again and didn't fire up. Spent twenty minutes checking electrical connections and connected the jumper box back up and the car fired back up. shut it back down and tried again, fired up again. Let the car sit for an hour, drove back out to grid, ran the race from the back and it ran strong without an issue. On Memorial Day weekend we went out to INDE in Wilcox and ran the test day on Friday, we ran four 30 minute sessions without a problem. Went out first session Saturday morning and the car ran great again for the full session. was idling back to my paddock and the car just shut off. Tried to start it and it just spun over fast. No codes on the LED light so didn't know where to start. Tried checking electrical connections, grounds ETC and couldn't find anything wrong. Checked all the Data, fuel pressure, battery voltage, ECU temp, fluid temps etc and could find any anomalies. Tried to start the car all Saturday but it wouldn't light up. Loaded it up and pulled back to the shop Sunday. The car sat in the trailer for three days and I pulled it out today and again checked all the connection, disconnected the Crank Position Sensor, checked the wires, checked the grounds again, checked the Z-Wires on the bottom of the main disconnect and all was fine. I connected the jumper, turned it over and it fired up no problem?????????????? I pulled the plug on the Cam Sensor and it ran for about 5 minutes and shut down. I did that to see if the LED would show a code but it didn't. Fired it back up and pulled the TPS and it changed the way it was running. reconnected that and pulled the MAP sensor and it ran very rough and died. No LED on that one either. I pulled the Crank Position Sensor and it too ran for about 5 minutes and shut down but no LED light code either. Pulled the O2 snsor plug and no light on that either. I don't know if this would trigger the LED code light but I was just throwing mud at the wall to see what would stick. Any Ideas what may be shutting the car down randomly like this and then not allowing it to start back up????
Thank You Ahead Of Time...