2013 gmc acadia 150k, routine maintenance done religously.  Currently no engine light, runs fine on idle, accelerates with no slips from transmission, but shuts off when i go to complete stop from running anywhere past 40 miles. run the diagnostic scan tool, MAF sensor increase on load, throttle sensor opens on load, o2 sensor spikes 100 to 700 and back to 100. Fuel injector1 pressure at 59, Short term fuel goes +/- 3%, the only thing i see is Long term fuel at +14 and +17,  but goes down to +4 and +8 on 2500rpm running lean, does that indicates Vacuum leak due to unmetered air going in? But i have spent hours checking the vaccum hoses and air intakes didnt see any cracks or worn hoses, sprayed w40 and carburetor cleaner on hoses with no effect on engine idle. Its driving me nuts pls Help!