Stumped on this turbo surging/pulsing crap
My truck has been boosting weird. At half throttle it is most noticeable running up through the gears. It pulses, I can hear it through the exhaust note and I can hear it from the turbo, like the veins sweeping. At full throttle it is not as bad but is still there. The truck makes good power, its just very annoying. I pulled and cleaned all the turbo boots and they are fine. It's almost like its the PCM telling the turbo to pulse and surge. To describe it more its like every half second constantly. It also does it when it shifts. I did have the turbo apart about a month ago and cleaned it, I did use anti-sieze but now I hear that that might not have been a good idea. I'm thing some sensor or the VGT soleniod is bad. Any help?