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bjmkelly
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brake booster faulty
bjmkelly replied to TopGun2000's topic in 9PA, 9PA1 (Cayenne, Cayenne S, Cayenne Turbo, Cayenne Turbo S)
Huge thanks all for this diagnostic aid. The big warning lamp 'Brake Booster Faulty' was ominous and expensive looking but with the help of this thread i fixed it easily and in a satisfying manner. I found the cracked tube where the spigot enters at the 'JB weld' in the second photo above. My first approach involved heavy duty metal tape, but the engine heat is intense there and the adhesive turned to mush in a few minutes. My second approach was even easier to execute. I removed the entire tube from the silver colored booster pump to the spigot - about eight inches in length but with a few fittings - and replaced it with a cut length of vacuum hose from O'Reilly car parts. I used a hose clamp (jubilee clip) at each end, and it all felt rather robust. Total cost was $1.49 for the length of hose plus a few cents for the clamps which were part of a big assortment box i already had (very useful to have around) The warning light extinguished itself after a minute or two, no programming required. Thanks especially Voodoocat and Topgun.