1984 300SD
There is a vacuum line that runs to a switchover valve on the front
passenger side and then goes to the front of the turbo.
This line is leaking vacuum and the car is slow to shut off.

Is this for overboost protection? I have a boost controller and gauge installed
and can monitor the boost that way.
Is it OK to just cap off the line coming off the front of the turbo?

Thanks,
Jeff

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1984 300SD 300,000 miles--two tank WVO setup
2.88 diff & 500SEL anti-squat rear end