Tried asking in the RST forum but no luck.

I got a S2 on EFi and have been away on holiday and not used the car for 2 weeks. Now its developed a problem.

When i start the car from cold its runs fine and idles perfectly. When the car gets up to running temp it still drives fine but when i pull up to lights or stop it wont idle and stalls. so i have to sit there reving it at 2 grand. Ive cleaned the ICV out and that hasnt helped but dont know what it could be as it hasnt been used. Didnt have this prob before i went away.

any thoughts?

 

Try cleaning the carb out i had the same problem on an orion i had and that sorted it for me.

 

Have you set the base idle properly? If not that might be the cause of the problem.

 

block the pipe that connect to your dump valve then try it, it maybe a defective dump valve!