[Healeys] brake servo causing rpms to increase 500 rpms

[Oudesluys]

Probably a leaking brake servo seal or membrane, depending on type of 
servo or perhaps the one way valve that is connected to the vacuum tube 
from the manifold.
Kees Oudesluijs
NL


Bill B schreef:
> hello fellow Healeyites:
> still having brake servo problems
> on a bj8, when i apply brake pedal pressure, the engine turns increase by
> 500 rpms... hear a "hissing" sound coming from the servo...seems to brake
> ok, but this rpm thing can't be...
>
> any suggestions?
>
> thanks in advance,
> Bill Browning
> Charlotte
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