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Re: brake assist
>Having started the car, and driven up the drive and come to halt, I
>notice that there is very little brake assist. Once off the drive,
>at the top of my road, about 100 yards later, there is full assist.
>I presume some pressure is being lost overnight/over a period of
>and the engine has to be driven for a period to restore full servo
>effect....does this sound right?
Sounds like a bad "bomb" (hydraulic pressure accumulator). If it
hold pressure, it will take a little while for the hydraulic pump to
repressurize it. Check out
for a diagnostic procedure for the bomb and brake servo.
>Is there something I can have done quickly which might put off the
If the bomb fails the common tests, you can try flushing and refilling
the Pentosin hydraulic fluid. Sometimes this will clear the check
and solve the problem. However, if your car still has the original
it's probably dead. They only seem to last about 7 years. A new bomb
expensive, but the job is simple, if messy.
'90 CQ 20V - my 'racing-iron' ;^)