Low and ruff idle randomly! Help needed.
 

Hi everyone.

I have a 965 turbo 3.3l 1991. When i start up the car cold it runs normal och runs perfect, i can drive the car without any problems.
When i have driven the car from cold start and its warm i can turn off and on the car without any problems, but if i wait about a hour it idles very rough and low. When this happens i go out and drive the car at high revs and it runs perfect again.

What can the problem be?

//Taif

bump

Not anybody with a guess or similar problems?