I recently attempted to make the switch from my jb4 g5 iso to cobb. The car runs awesome on the jb4. When I first installed the cobb I was having crazy throttle closures due to over boosting. I checked the wastegates with a vac pump and adjusted the rear a little. A member was kind enough to send me a map to try with lower WGDC logs looked much better. Well I ended up uninstalling the cobb and reinstalling the jb4 until I had some more time to mess with it. I then decided I was just going to get a protune and it would fix my over boosting issues. Today I put my jb4 on map 0 reinstalled the cobb and took it for a spin on the first pull I get the 1/2 engine light... p30ff low boost the car would only make 7psi on stg 2 :confused:. I checked my charge pipe and diverters everything looked ok. I uninstalled the cobb again and put the jb4 on map 2 and took a quick 2nd gear log and boost is right on target? Not sure what is going on at this point. Here are some logs if anyone has any input. Sorry they are not all nice 3rd gear pulls the i didnt want to rev it out running poorly.
Log 1: First install cobb stage 2 v401
Log 2: Switched to stage 1 v401
Log 3: Stage 2 map with lower WGDC
Log 4: Install from today 30ff
Log 5: JB4 map 2 right after i uninstalled the cobb
Log 1: First install cobb stage 2 v401
Log 2: Switched to stage 1 v401
Log 3: Stage 2 map with lower WGDC
Log 4: Install from today 30ff
Log 5: JB4 map 2 right after i uninstalled the cobb