I posted this by mistake in general maintenance so have re posted to here.

 

 

Hi and thanks for your responses in advance

My v reg 1.8 turbo octy has a brake problem

Solid pedal but sinks to the floor (under pressure) when engin is started. Noticed problem on my way home when the pedal almist hit the floor before the brakes operated. Doesnt seem to be air fluid lvl ok no sign of any leaks. I know what I think it is but would really appreciate some one who actually knows what they are talking about to give me their opinion. Also due to the age and low value of the car I dont want to spend large sums of money.

Awaiting your replies with anticipation

Regards Jason

bleed master cylinder

Yes, start by bleeding the brakes, but take note that this might quite possibly be a fault with the brake vacuum servo rather than the hydraulics.

7 hours ago, KenONeill said:

Yes, start by bleeding the brakes, but take note that this might quite possibly be a fault with the brake vacuum servo rather than the hydraulics.

I am even more in the dark with the vacuum side of the brakes than the hydraulics could u give me an idea how to check for fault or otherwise on the vacuum servo. When you put the pedal down and start the engin the peddle drops I thought this indicated the servo was working am I wrong in making this assumption?

Edited 21 April, 20179 yr by JPBSLXI
Typo

On 4/21/2017 at 17:29, JPBSLXI said:

I am even more in the dark with the vacuum side of the brakes than the hydraulics could u give me an idea how to check for fault or otherwise on the vacuum servo. When you put the pedal down and start the engin the peddle drops I thought this indicated the servo was working am I wrong in making this assumption?

Yes the pedal drops a bit when you have vacuum (compared with if you've pumped the servo out engine off anyway) but you said it was sinking to the floor.