I have an 06 NPR 4 Cyl Diesel When under full throttle for extended period engine sets under boost code and goes to just above idle Help!
Already Tried: Replaced Boost sensor
Hi I will help you with your problem please reply through,reply to expert link wait to rate until all your questions are answered.Now from the turbo outlet you will see what are called hump hoses they have one hose off of turbo then a metal tube then go into the air to air cooler[looks like a radiator and is mounted in front of radiator]then out the other side there will be another hump hose metal tube and last hump hose before going in intake manifold look for holes in hoses or in air to air cooler that will cause your problem and they are easy to change just drive to parts store {it will not hurt the engine} or take off and bring with you to match up.
There are no holes in hoses or metal tubes
There are no holes in hoses or pipes
Did you look at turbo take both sides off and check the impellers for missing or bent fins,Intake and exhaust sides
Please rate my answer informative or better so I will get paid it will not cost you any more money you already paid but I did not get paid and won't until you rate my answer thank you spanky