Outside temperature gets to above 80 degrees my car starts to hesitate and buck

We need to with checking fuel pressure when this happens. Normally when it is temp related like this a fuel related issue. We need to monitor fuel pressure when it is happening and see what it is doing. It should be pretty steady but if it is dropping or fluctuating then we need to dig deeper into this.

Here is a guide that talks about how to do this:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Just tape the gauge to the windshield so you can watch it while it is happening.

Here is a guide that talks about hesitations that we will get into if the fuel pressure is okay:

https://www.2carpros.com/articles/engine-hesitates

Let me know what the actual PSI number is, not just that it is good. Thanks