![](./images/smilies/spacer.gif)
![](./images/smilies/spacer.gif)
![](./images/smilies/spacer.gif)
![](./images/smilies/spacer.gif)
The car is exactly as per before the turbo was removed, but I have removed the boost controller to simply the system to help try and diagnose the problem.
![](./images/smilies/spacer.gif)
![](./images/smilies/spacer.gif)
The boost just keep rising until it hits fuel cut at 18psi by about 5250 rpm
![](./images/smilies/spacer.gif)
All pipes have been checked for leaks, the actuator has been confirmed to be operating correctly, isn't hitting the downpipe etc.
![](./images/smilies/spacer.gif)
![](./images/smilies/spacer.gif)
I have had the car checked over by a local Jap car specialist, and is currently back with Turbo Technics but we are all at a loss as to what the problem could be.
![](./images/smilies/spacer.gif)
![](./images/smilies/spacer.gif)
The car is fitted with a 3" decat downpipe and a 3" Fujitsibo exhaust which I have been running for some time without issue before the turbo rebuild.
![](./images/smilies/spacer.gif)
![](./images/smilies/spacer.gif)
The only current explanation is that the rebuild turbo is flowing so much more that due to the extra flow of the full 3" system it cannot control the boost.
![](./images/smilies/spacer.gif)
![](./images/smilies/spacer.gif)
![](./images/smilies/spacer.gif)
![](./images/smilies/spacer.gif)
![](./images/smilies/spacer.gif)
![](./images/smilies/spacer.gif)
![](./images/smilies/spacer.gif)
Does anyone have any experience of running a 3" de-cat and 3" system with a freshly rebuild standard CT20B turbo?