Ok little history, i have a 2000 civic Si and i have a drag 3 turbo kit installed on it. Works great! Makeing 251whp at 8 to 9lbs of boost. But i wanted MORE boost so I just installed my 3bar map sensor and im useing uberdata 1.66. I reprogramed my chip correctly (i read up on useing a 3bar with uberdata alot) so she runs good.

Ok first problem, when im on the freeway going, you know over 60mph, and then come to a complete stop right away. My car loves to die and if it doesnt die it idles at like 500rpm. And if i leave it there and not help it by giving it gas it throws a code 6. I know what code 6 is but i dont get why it would only throw a code when it has a bad idle. Now mind you this is not all the time, it only happens when its been running for a while and like i said on the freeway.
So im wondering if i have a vacume problem? or the Coolent Temp Sensor (Code 6) is ******* with my ECU.

Any comments?