'88 5000CD TQW engine knocking

[frankbauer@thevine.net]

>Does anyone have the answer to this?
>Intermittently, the digital boost guage will stop functioning and read
>0.0, or 0.1
>Once this happens, the engine will knock under hard acceleration
>(pinging begins at about 3800rpm).  No warning lights come on.
>When the boost guage is functioning properly everything is great!
>        ???

i would guess you have an intermittent vacuum leak in the line that goes
from the mainfold to the computer..

frank

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