Quote Originally Posted by 99GTPMLA View Post
Yes, this is a 99 GTP. I have a ECU with dsmuts program and don't know if it's going into cat protection. I didn't even know it had that feature.
Me either I found out the hard way. In the supercharger table there is a box called "cat over temp boost reduction" or something to that effect. Once certain conditions are met while holding it wide open it commands the boost bypass solenoid to open. I had to go in on mine and turn it off