Running td04, stock ecu and 6psi boost. Afr gauge is reading between 13-14 on boost with wide open throttle so i switched it off immediately. The AFR readings are fine on startup, idle and when off boost. In terms of the fueling setup the follwong has been done.... walbro pump fitted about 7 years ago, recently had the injectors rebuilt and tested, new genuine fuel filter, stock FPR. I have checked the map sensor and getting a solid 5V all new vacuum lines on it too. Also replaced the vacuum line for the FPR. Spark plugs also indicate its running lean Any suggestions???