Have notice a wierd problem recently, the car tends to loose brake feel when the engine is in Vaccum but is normal under boost. Checked for any cracks or leaks in the vaccum hose but all looks fine, anyone been on my path before??

The Suction jet pump is there to generate Vaccum when the engine is in boost right? Throw some light here guys plz.. Kinda stuck right now.

 

 

Edited 9 March, 20206 yr by skoda5232

If you mean the Y shaped vacuum pump, then yes, these are known to crack in the valley of the Y.

 

Mix up some soapy water and brush it around the valve and see if you get any bubbles if someone revs the car while you watch.

On 10/03/2020 at 02:21, kentphil1 said:

If you mean the Y shaped vacuum pump, then yes, these are known to crack in the valley of the Y.

 

Mix up some soapy water and brush it around the valve and see if you get any bubbles if someone revs the car while you watch.

Thanks kent, will do. Another finding is that the pedal is rock solid after parking for an hour or so.. i checked the first one way valve from the manifold, couldnt find anything wrong as the valve is flowing only in one direction like it is meant to.

Edited 12 March, 20206 yr by skoda5232

Today blocked off the vaccum line from the suction jet pump and to my surprise the brake response went from bad to worse😫... totally confused..