Vac leak affecting brakes
Posted: Mon Feb 10, 2014 8:29 am
As in my other posts I have the anti pollution fault regularly popping up due to a vac leak on the swirl actuator but I've noticed when the car is boosting properly that I lose braking performance sometimes which I'm also putting down to a vac leak.
I drove up the road at about 35 and stamped on the pedal, nose dipped sharply, ABS kicked in car stopped dead then pulled away and did it again no ABS and car gently slowed to a stop - my diagnosis vacuum leak (correct me if I'm wrong).
So my question is would a leaky actuator leak enough vacuum to affect the brakes in this way? I know the system is designed to prioritise the brakes.
Every time I've planned to change the actuator its tipped down with rain but I did wonder whether plugging the vac feed for the EV's and EGR at the reservoir and from the cylinder would be a good test?
Obviously I'd get warning lights on the dash but the brakes should then have max vacuum pressure?????
I drove up the road at about 35 and stamped on the pedal, nose dipped sharply, ABS kicked in car stopped dead then pulled away and did it again no ABS and car gently slowed to a stop - my diagnosis vacuum leak (correct me if I'm wrong).
So my question is would a leaky actuator leak enough vacuum to affect the brakes in this way? I know the system is designed to prioritise the brakes.
Every time I've planned to change the actuator its tipped down with rain but I did wonder whether plugging the vac feed for the EV's and EGR at the reservoir and from the cylinder would be a good test?
Obviously I'd get warning lights on the dash but the brakes should then have max vacuum pressure?????
) once the vacuum's been used, so using the brakes twice in quick succession makes the second time far less effective.
- granted this goes hand-in-hand with removing 2-off egr valves and the air doser, so maybe you don't need it anymore, though I wouldn't fancy convincing an insurance company's engineer).