Car wont start on first try when hot out

Hello, sometimes during hotter than expected temperatures, the fuel quality can be an issue, and fuel can vaporize before hitting the engine in quantities. This is because there are several different "blends" of fuel during the course of the year for use in different environments and temperatures, and if the weather is abnormal with hotter or colder than expected temperatures, the fuel could cause this symptom. On the other hand, a full battery of testing should be performed to ensure you do not have early signs of a bigger issue that could fail more consistently down the road. Checking fuel pressure, ignition spark, air intake and exhaust flow is important, along with engine compression and timing.