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bluedog

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  • Porsche Club
    PCA (Porsche Club of America)
  • Present cars
    2006 Cayenne Turbo S
    1995 995 C4 Convert Prototec Twin-Turbo
    1983 Carerra Convert
    1994 Land Rover Defender

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  1. Does anyone know if the vacuum pump has a relay?? I have had the brake booster light on and off for a month. Yesterday I went to push the brake and it was all leg to stop the 6k lb. I have read most forums and checked all the hoses, pressure tested the line, etc. I took the vacuum pump off and cleaned it, and tested it with a 12v powersupply and it ran well. However, when the pump is connected to the car it turns on just after start up for 5 sec or so and shuts off. This is even if the vacuum line is disconnected from the pump. Ergo, is there a relay that is not doing its job to tell the pump to run longer or at all? Thanks
  2. Try this http://www.6speedonline.com/forums/cayenne...-installed.html I just got a set in today and will try this weekend
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