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Re: Hard brake pedal, diagnosis help Posted by bobc [Email] (#473) [Profile/Gallery] (more from bobc) on Sat, 20 Jul 2013 20:52:51 In Reply to: Re: Hard brake pedal, diagnosis help, jeff02 [Profile/Gallery] , Sat, 20 Jul 2013 19:32:00 Members do not see ads below this line. - Help Keep This Site Online - Signup |
I've gt the mechanical pump mounted on the side. Seems to be generating good vacuum (judging by feel) but I'll check it with a gauge like in your vid.
Did you replace the line and check valves?
My thought s that if the pump is bad the symptom would be intermittent: when the engine is running under vacuum you should have power assist, but when the turbo is pressurizing the intake, you'd loose power assist and have a hard brake pedal.
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