My 97 es300 wont start after the engine warms up. Kinda smells flooded. Temp running slightly higher than normal. Replaced tps, crankshaft position sensor, fuel damper regulator, plugs, wires, egr , cleaned throttle body and maf sensor, changed some leaky hoses and still no progress. Once its running it runs fine other than a low rough idle

 

Just keep changing parts, you'll get it eventually. Just kidding...I would check the engine coolant temperature sensor (check, not replace) and clean the IACV. Check the ECT sensor resistance hot and cold and compare against specs.