[tylers1027]

After 2 years with the JB+ I decided to upgrade to the JB4. Install took about 25 minutes and that includes routing the OBD cable through the firewall (didn't want it hanging around the door). As expected; low end is around the same but pulls a little better on the top end. Running map 1 until my datalog gets reviewed. I noticed on the highway when I get on throttle enough to climb a hill/pass etc. but not enough to downshift; once the boost climbs to 20.5psi or so the car starts jerking/stuttering. I think it's going into limpmode. I'm thinking with the AA downpipe some adjustments need made to the JB4 settings which hopefully BMS will recommend. When I did a pull I saw my ECU psi reached 19-20psi + 3psi for map 1 for total psi of 22-23psi which I thought seems kindof high.