2016 HINO 195. Check engine light + loud vacuum-like noise with hard acceleration. Loses power when loaded or going up hill. Dealer did a regen & a scan. Code P0299 Turbocharger Underboost. Turbo functional tests passed. Cleaned and lubed turbo vent rod, cleared the codes & reset scr memory. Road tested & said OK. Truck is still making the same noise and doesn't seem to have full power. Any advice?