I have a 1995 Chevrolet Camaro with 3.4L V6 automatic. After sitting for 1/2-1 hour the car will chug and struggle to idle on restart and quit. Sometimes will get about 50 yards and it will quit. After it quits, it won't restart. If you wait an hour to cool down, it will start back up fine. It is difficult to get the stumbling to clear out, even reving up the engine in neutral. If I can keep it running for over a minute, it will clear out and run fine. Have recently installed plug wires, plugs, fuel filter, O2 sensors and injector cleaner. Have checked fuel pressure regulator and no gas in vacuum line. Have also checked EGR valve and all 3 solenoids are sealing. Car has about 80,000 miles. No Codes. Thanks for any help you can give!

 

2 things come to mind. IAC motor or a plugged cat converter. Check your back pressure.