Medium and Heavy Trucks
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Hi my name is***** will try to help. Are you experiencing any other symptoms? any fault codes?
What year is this truck and is it an EGR engine? Also have you confirmed the readings are accurate with a mechanical gauge? Do you have access to the Detroit software or a scan tool that will monitor real data while driving?
Bare with me. I have a kids bday party here this weekend and family visiting.
Aftermarket turbo? Or aftermarket boost gauge?