Recently had the MAP reference going to the fuel pressure regulator hose split on me. Didn't notice AFR change but did notice boost was a bit low on WOT (boost trim to lower boost when injector pressure drops) and fuel pressure was a bit high at idle (full vacuum).
Upon inspection found and replaced the split vacuum line and things are back to normal. It was great to see the ECU calculating the correct fueling needs and holding target AFR even with the lack of MAP reference for the FPR.
