Have you done a log of the timing and compared it against a known good, perhaps if the timing isn’t advancing correctly and then it won’t demand boost?abdullah wrote: ↑Thu Feb 25, 2021 9:52 amunfortunately we canceled the oxygen sensor and tried it. We did a DME reset. We tried a new brain. We did a software copy from another e89. There was no improvement. my ridiculous car goes to 100 in 11 seconds and there is no fault code and our trials were inconclusive. .
Different car but I had a kit car with a bike throttle body swap and whoever did it didn’t connect the throttle potentiometer up correctly and it didn’t advance the timing and was very flat until you got up in the higher revs, once I switched the wires around it pulled right through the Rev range