I recently had some work done to my car and ever since then my car has not been idling correct. the place that did my car said that i hooked up the boost controller incorrectly. the way i had it was having the boost line from the fuel pressure instead of using the line that connects to the blow off valve. so they changed the boost controller to connect to the blow of valve line and ever since then its been idling at 1100 rpm. so i adjusted the throttle and the screw for finer tunning and when i get it to a spot im happy with i drive the car and it will either idle high at 900-1100 or drop to 400-600! it has also been stalling from the low idle! i cannot work out why i cannot find a correct setting unless somethings hooked up wrong or the ecu hasnt had time to adjust to the new settings? What do people think?