Skispcs

2014 Fusion with 2 Liter Ecoboost. Seeing 28 on LTFT, small numbers on STFT When I raise the idle to about 2500 the LTFT stays high. If it was a vacuum leak, I would expect the numbers to drop. I have checked for a vacuum leak but have found nothing yet. Attached a screenshot of data while idling at 2300 for 5 minutes. What else should I be looking at?

Thank you for the responses, I will do some reading. Getting back to the main point, looking for some ideas to solve the lean bank 1 or anyone with suggestions on common vacuum leak areas or ideas for locating the a leak. Might try a propane torch but I have not used that method before.

Thank you for the response. Do you have any references to cleaner damaging the bearings that I could read? The bearings should be sealed to prevent ingestion of things from the intake side of the turbo into the bearings.

2014 Fusion with 2.0L ecoboost I occasionally receive the P0171 code (lean bank 1). It may go away for a month and then comes back. Using my odb2 reader, the sort term fuel trim is good but the long term fuel trim is high at idle. At idle it is typically 22 to 27. Under acceleration it appears to drop down a bit. At idle the O2 sensor seems to read a bit high (0.65 to 0.7) which if I remember means that the mixture is rich? I am thinking vacuum leak but I have not been able to find anything yet. I used a can of carb cleaner to spray around many of the hose connections to see if the idle changed at all. Can I search for a vacuum leak on a turbocharged engine the same way my old school butt looked for one? Spraying a bit of carb cleaner in the intake did not seem to impact the idle much. Any hints or common failure places on the 2.0L that I should take a look at? Thank You