The MB's are running great but a quick brake question on my Volvo if you'll allow it:

The power assist went the other day. Brakes work ok with a strong leg. However, after running hard, the power assist will kick in for one time on the pedal and then return to hard. Why the inconsistency? I can generally fix stuff but need you guys to steer me in the right direction??

Thanks,

Don

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DAILY DRIVERS:
'84 300DT 298k (Aubrey's)
'99.5 Jetta TDI IV 251k (Julie's)
'97 Jetta TDI 127k (Amber's)
'97 Jetta TDI 186k (Matt's)
'96 Passat TDI 237k (Don's
'84 300D 211k Mint (Arne- Undergoing Greasecar Conversion)

SOLD:
'82 240D 229k (Matt's - Converted-300DT w/ 4 speed