My 2000 s70 turbo runs bad cooled it acts like there is no throttle it revs way up & down even if you dont touch the gas if you put in gear it will take off wide open & then it will usely die if you stay with & get it to warm up some it acts ok but if you shut it off & let it cool all the way down it acts up agin put if it only shut off for like 2 or 3 hrs. it seems to be ok when it is cooled & doing this the tpi light cooms on do yuo think the throttle pos. sensor is bad our something that controls it our? THANK YOU ROGER