Medium and Heavy Trucks
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Thanks for asking your question and requesting me. I will try and help you out.
If I remember correctly, the engine light does not come on and the fuel pressure is within 65-85 correct?
I see. Thanks for the information.
I would suspect you have a low boost condition. This can be caused by a leak in the air piping or air to air aftercooler on the truck. I would first inspect all of the piping to see if there is a hole in any of the rubber boots that hold the pipes. From there you may want to cap off one side of the air to air cooler, and pressurize it. They have been known to crack and leak and cause low boost. You could also have a faulty turbo.
Please let me know if you need more help or have more questions.
Ok sounds good. Look for exhaust side fin damage and excessive turbo shaft end play. It should only move in and out about an 1/8 of an inch.
Please reply back if you need more help or have more questions. I am happy to assist.