Join Date: Mar 2017
Location: Los Angeles/Fort Collins CO
Re: Turbo whine?
ford power steering pumps, especially those of the 7.3 and earlier, are very loud when improperly working. They sound like a supercharger and that is no understatement. If it was a power steering problem that video would have made it obvious for all of us if not me at least as I have heard and worked on quite a few power steering problem ridden trucks in the past. removing the belt would have been my next piece of advice if that whining noise was even remotely close to a power steering sound. I'd say, take the turbo off and check all the clearances and seals. if anything is remotely bad remove it and rebuild the turbo. Intake whining sounds just like the turbo, but only really at high boost/rpm. Your sound started as soon as you hit the throttle and sounded like it had inertia to it, E.G. it took a second to go away after the truck returned to idle from an rpm spike.