Alda, banjo cleaning, and boost controller is what you need to get the motor back to life. These are all free or very cheap fixes. I put in a boost gauge and saw I was only getting 7 psi. I upped this to 12-13 psi and it feels like a new engine. The ALDA was a good fix but only helps you at very low speeds.

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1985 CA 300D Turbo , 213K mi