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Old 04-15-2016, 02:50 PM   #11
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I had a truck do that once. It was so long ago I don't remember the cause but it was an intake gasket leaking or something. When the engine was working hard it would suck air and whistle. Check all your gaskets. It could be the air cleaner system. Check the air cleaner and ducting to make sure everything is air tight. Is the air cleaner dirty causing it to suck air through a tiny leak? Check the intercooler system and ducting if you have one. Maybe a turbo gasket? Just check anything that sucks air or builds pressure. Just guessing but I think it is air intake system related somehow. Good luck.
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Old 04-15-2016, 05:51 PM   #12
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a diesel fuel pump is a carburetor equivalent. diesel engines are just complicated air pumps. after achieving less restriction on the airflow in and out extra fuel takes advantage of the extra air, and gives extra performance. at least that's what the instructors taught back in 80.
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Old 04-15-2016, 06:08 PM   #13
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Originally Posted by Robin97396 View Post
"limioting"? Is that Italian?
sounds more french to me
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Old 04-15-2016, 09:31 PM   #14
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Old 04-16-2016, 11:21 AM   #15
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Originally Posted by cadillackid View Post
since this just started it could also be an air leak somewhere.. perhaps an exhaust leak around the turbo or a pinhole leak in the intercooler?
That would be my first guess. Check all the rubber air pipes running past the turbo on the intake side. Follow through the intercooler. You could try spritzing the pipes and intercooler with a solution of soap and water in a squirt bottle to locate leaks.

Have you noticed a slight drop in power as well?
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