What makes a 93 z28 run good until it gets hot then it back fires and cant accelarate but idles fine now wont start at all?

The issue with your 1993 Z28 could be related to several factors, including a failing ignition system, fuel delivery problems, or a malfunctioning sensor. When the engine heats up, components like the ignition coil or fuel pump may fail, leading to backfiring and loss of acceleration. Additionally, a faulty coolant temperature sensor could cause incorrect fuel mixture adjustments, further complicating the problem. If it won’t start at all now, it may indicate a deeper issue, such as a failed fuel pump or a bad ignition module.