Hi, I could use some help, I bought a 2000 S80T that has not run since June 09, I just rebuilt the top end with new valves, seals, belts, water pump and steering pump. The car started right up and ran good, but the longer it runs then it does not want to idle good, and at times dies? I have a small code reader that had a po0102 code? no engine lights come on, If I unhook the MAS sensor on the air box hose it seems to idle just fine, do I need a new sensor? any suggestions would be very helpful
thank you

 

As for my car, it idles at 600 to 700. Nothing higher.

 

I had that problem with my 99 s80 T6 and cleaned the ETC and now it runs fine.
Here is the procedure on a non turbo
http://www.youtube.com/watch?v=8Zaxtm-hdyo