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M278 P0299 code. Wastegate rod shaking

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Old Sep 1, 2025 | 10:10 AM
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1983 Nissan Shltbox
Originally Posted by gladerider
Sorry for such a late response Chevota.

The solenoid fixed the problem for me. It was a very easy fix.
However, now I am getting a P012D, mostly when cold. it goes away when the engine/turbo is warm.

So the hunt begins again.
Been working on this issue myself in the W221 forum. Just stumbled upon this thread today. I have a new (Amazon) check valve installed and vacuum lines to wastegates clear. My symptoms drastically improved however I'm still slightly symptomatic (chugging/stuttering at light throttle increase) but have just ordered a new boost solenoid thanks to you and Prihadi's work here on the forum, thank you!

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