Turbo Squealing under load
#12
Had a phat shaft 62 on my 07' did the same thing, perform a running diagnostics with a top notch scanner like A Gennesis or a scanner Equivilent to, I bet your Fuel Pressur under a load is lower than Fuel Pressure at an idle, (that was my case) Cause...Restricted Fuel Lines. Cure...unhook fuel lines from motor, drain all fuel from tank, pressure up fueltank and watch sand blow out of unhooked fuel lines at motor, drop tank and inspect.Took me about two hours to do this. Tank didnt look to bad but I had a F*** load of s*** in my fuel lines. I dont know why but I did. hooked everything back up, ran a running Diagnostics again and BAMMM, problem solved. The truck ran good before I cleaned the lines the Turbo would just Squeal whenever I boosted over 18 Pounds. I aint no professional but this was my findings. hope the info is helpful to you, took me six months to figure it out Good luck
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