The car drives well but if the engine is warm and then the car is turned off, it won't turn back on. It acts like its out of gas even when it's full.

What is your question?

Works better when it's colder outside. Sometimes turns off while idling in traffic and won't turn back on.

What makes this problem better or worse?

It's better when the engine or weather is cold.

How long has your 2000 Audi A4 Quattro had this problem?

six months or more