Quote: Originally Posted by
silverstreek 
x2, how much for upgrade and turn around time.
also, what's the open/close loop fueling for?
Open loop means the PCM is not looking at the O2 sensors and keeping A/F ratio at 14.7. Normal operation is closed loop. Certain conditions will cause the car to leave closed loop, including high engine loads, cold motor, and fault conditions. Under normal idle/cruise conditions you want to be in closed loop for best fuel economy and operation.
Turn around time is usually a couple days.
Todd
