I don't ever get closed loop flag on winaldl. Am I not in closed loop? Or is this flag checked when you not in closed loop? If that was the case it would be checked upon start up. Hmm... thanks again thirdgen

 

Is it giving you the rest of your data properly? You'll need to look it over to see if theres any problems. From what I remember, after the cars been running for its set amount of time, theres only a couple things that will determine if it'll go into closed loop. One is temperature, the temperature that the computer sees, not the gauge. Another is that your o2 sensor needs to send a signal thats not only in the right range, but varying. Mine was failing to go closed loop, I looked in the 02 sensor readouts, the sensor was bad in such a way that it sent out about .45 volts, but barely fluctuated. Maybe yours is bad too.

 

o2 sensor is new. ... is the box checked when ecm is in closed loop??

 

checked when in CL

Do you have headers?