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Not too sure about your airbox pressures but you can pull the air outlet tube coming off your turbo and look for any evidence of oil. this means the turbo oil seal is leaking. also inspect the turbo fin ( you will see it with the outlet tube off) see if the bearing has play or the fins are busted off! if not your turbo is most likely ok, You may also have a bad Blower governor, There are weights, bearings and shafts inside the governor that wear out and will cause symptoms like this. good luck |