[TomFalkiner111]

Hi guys. I wonder if anybody can help with a mysterious brake problem. In the beginning of last year my brakes were perfect. Nice firm pedal, the car would stop on a dime. Then I went and put Castrol SRF brake fluid into it. Big mistake. In just a matter of days my brakes got softer and softer. So I drained the SRF and replaced it with DOT 4. Too late. The damage was done. The seals in my master cylinder had been corroded.

So I ordered in a brand new OEM master cylinder, upgraded to stainless steel brake lines, serviced all the calipers and installed new OEM brake discs and EBC Green Stuff pads. When everything was bolted into place I filled up with DOT 4 and bled all the air out of the system. I expected the car to return to its old braking self but it hasn't.

The brakes are still soft. Especially at lower speeds in traffic. If I apply a slow and constant pressure on the brake pedal it will eventually go all the way to the floor and the car will still keep on creeping forward. At much higher speeds with a sudden, jabbing force the brakes feel a bit better but nowhere near as good as they once were before I put in the SRF.

I don't know what to do! Does anybody know what might be causing the problem? Could it possibly be vacuum related? Any advice would be most appreciated!