Boost Leak Question
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Ok so you accelerate away from a light and someone steps off the sidewalk!! Now in the UK we use the pedal in the middle (on a 6 speed) to stop! Ive now had 2 996 turbos that do this, its pretty simple, the line going to the servo has a vacuum in it, if it gets pressure you have no power brakes. You may think your being clever but im trying to figure out the solution to a problem here, do you think im making it up? If I accelerate hard and have to suddenly brake sometimes I have a rock hard pedal, its not rocket science.
In fact if your feet cant move fast enough to come off the throttle and brake while still on boost maybe you need to rethink your car or driving style.
In fact if your feet cant move fast enough to come off the throttle and brake while still on boost maybe you need to rethink your car or driving style.
Last edited by pwdrhound; Mar 20, 2015 at 10:17 PM.
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Ah, OK that kind of explains it... By the time you move your foot from gas to brake, you are no longer at full boost (I guess close maybe). I've never gone full pedal with people that close, so that situation has never presented itself for me. Thanks for explaining it - I'll have to give it a try. I wasn't trying to be a di*k, I just didn't get get how you were getting there.
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That won't fix it. That's the first thing I swapped out when trying to find a solution. There is only one thing that you can do to cure this..
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As common as they are, I think boost leaks are overrated as "problems". There's only so many places they can occur. Although that might well be the jaundiced view from one who seemingly has had them all lol
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I've seen this happen on other cars of mine, I've actually had foot on the brake when boost has built and been shoved back in my seat as the pedal pushes back - it's no joke. Vac booster does,the opposite when pressurized. Sounds like the stock valve isn't acting fast enough for him and he's got transients often enough to notice it, Pwdr's solution is the best since it will divorce the brakes from any boost source.
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Ok so you accelerate away from a light and someone steps off the sidewalk!! Now in the UK we use the pedal in the middle (on a 6 speed) to stop! Ive now had 2 996 turbos that do this, its pretty simple, the line going to the servo has a vacuum in it, if it gets pressure you have no power brakes. You may think your being clever but im trying to figure out the solution to a problem here, do you think im making it up? If I accelerate hard and have to suddenly brake sometimes I have a rock hard pedal, its not rocket science.
In fact if your feet cant move fast enough to come off the throttle and brake while still on boost maybe you need to rethink your car or driving style.
In fact if your feet cant move fast enough to come off the throttle and brake while still on boost maybe you need to rethink your car or driving style.
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My boost is 1.5 bar so was the other 996 that did it
It appears Pwdrhound has had the same issue and i guess this is why the 997 GT2 had a vacuum pump
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997GT2 oil scavenge / vacuum pump 997.107.022.72
997GT2 vacuum line 997.105.116.73
For pictures and a detailed description click on this link: https://www.6speedonline.com/forums/...tallation.html
997GT2 vacuum line 997.105.116.73
For pictures and a detailed description click on this link: https://www.6speedonline.com/forums/...tallation.html
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