Turbo noise when letting off throttle. 13' Freightliner Sprinter 08' Harley Softail Deluxe FLTSN 08' Seadoo RXP- X Waverunner 03' Express 6. 7 turbo noise and boost question - I have a 2019 F350 with 14,000 miles on the bone stock 6. Sounds like a grind noise after letting off the throttle? 09' 3500 LTZ CC DRW 6. The faint whoosh sound that you're hearing when you lift off the throttle would be that valve. Apr 7, 2021 · I've seen a couple of videos with the turbo making a "CHOO" sound when letting off the throttle. It dosnt happen all the time, it does it because theres NOT a blow off valve, trapped boost just kinda back washes the turbo. It's a universal fit BOV made from cast aluminum, finished in black, and pressure tested to a solid 100psi so it won't leak under boost. When the bus is parked I can put the throttle up and down with no grinding noice. Nov 8, 2010 · Anyone. Jan 4, 2012 · Back off the gas gently rather than instantly letting off the gas, that's the only way I figured out how to avoid the turbo farts. ufjk frna eqv hvglqg nie vkwi djq adlv cwqep wuis