Okay, I'll get hold of a new boost gauge and install the MBC and see what happens :O My best guess is a bad sensor or other electronics since the car boost just fine when it does...Legacy777 wrote:You don't need to up the boost on the MBC, you just need to see if it will maintain the correct boost pressure as stock. If it does then you know there may be an issue with the boost control electronics or something is up with the input sensors/data that tells the ECU what to set the boost at.
But could it be the O2 sensor maybe? I find it weird that when I drive the car hard and push it the boost suddenly rises.. Maybe the sensor is really clogged up and when I push it the sensor breathes or something.. I don't know haha.
When I achieve full boost by driving the car hard I can be at around 3000-4000 rpm while doing a pull and suddenly the turbo spools up much louder and gives the car more power..