Put a vac meter on it, see what it says. I think a good pull is like
13-17" if I recall from when I did mine. If it is down to a few inches,
then that is too low.
--R
Curt Raymond wrote:
Hey folks,
How do I know if the vacuum pump on my '85 190D is going out? Its slow to
develop vacuum at low speed, when I back out of my driveway in the morning I've
got no power brakes. By the end of my street like 50 yards away everything is
fine.
I replaced a short bit of line from the pump up to IIRC a tee not long ago
which made the car shut off better but this is a new behavior.
It looks like the vacuum pump is easy to replace, maybe have to pull the belt
but no other major parts. Anybody BTDT?
-Curt
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