It was originally doing the same on the ct9 but now I’ve got td04 on it with decat and blitz front mount, so I’ve got fpr with gauge and running 3 bar fuel and I put the 430cc injectors in but still the same so I changed them back for standards for the minute and I’m on the stock ecu, I do have an emanage ultimate to go in but I wanted to sort the problem first before adding that.
The sensor is at the end of down pipe and the gauge is prosport And the sensor was new
appreciate it thanks