Guys,

When I hit rev cut, the brakes is not working for a split second

It became hard as if you were stepping on the brakes when the car isint started.

Any idea whats causing them ?

__________________
Andrew

2008 Ferrari F430 Scuderia
2013 Audi A6 Hybrid
2013 Toyota Vellfire

had you lost traction on any of your wheels ?
sounds like ABS was having a sad

na..i was on a straight road.

__________________
Andrew

2008 Ferrari F430 Scuderia
2013 Audi A6 Hybrid
2013 Toyota Vellfire

I think whats happening is when you hit rev cut your engine will shut down for a split second. This will cause you to will loose vacum pressure to the brake booster & hence causing brake failure.

That's my story and i'm sticking to it

Cheers
Abdus

Yeah like abdus said ... i reckon what it might be is that something strange happens when you hit rev-cut, like fuel is cut and you end up with a stronger vacuum thru the manifold than there is in the brake booster.

So the brake booster drains thru the check valve.

So you have a hard brake pedal.

g.

Think I fix that problem.
Samco vacuum hoses doesnt have that little one way valve.

I refitted the stock lines that has the one way valve back in and no problems anymore.

__________________
Andrew

2008 Ferrari F430 Scuderia
2013 Audi A6 Hybrid
2013 Toyota Vellfire