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Do my Power Brakes Work?
I just realized that the power brakes on my 86 may not work. I've driven the car for over a year and never thought anything about it, I press the pedal, the car stops. I am curious about the power part only because I didn't notice any difference in pedal feel when the car was off or after I started it (rolling down the driveway). Any tips on checking booster, vacuum lines, or whatever the 911 uses for power brakes is appreciated.
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86 Carrera Targa - Garnet Red Metallic 88 928 S4 - Gran Prix White |
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03-30-2006, 04:19 PM
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you have power brakes on an 86 Carrera?
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Don Booth 87 Carrera Coupe (Current) 70 911 T Coupe 74 914 |
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03-30-2006, 04:55 PM
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yes, aren't they all supposed too?
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86 Carrera Targa - Garnet Red Metallic 88 928 S4 - Gran Prix White |
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03-30-2006, 04:59 PM
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Join Date: Dec 2002
Location: Dahlonega , Georgia
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Sit in the car with the motor off and put your foot on the brake pedal and lightly push. While maintaining pedal pressure start the car, as soon as the car starts and vacuum is created you should feel the pedal lower a little bit that's the vacuum assist kicking in.
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2002 Boxster S . Arctic silver + black top/int. Jake Raby 3.6 SS engine " the beast ". GT3 front bumper, GT3 side skirts and GT3 TEK rear diffuser. 1999 996 C4 coupe black/grey with FSI 3.8 engine . Rear diffuser , front spoiler lip with ducktail spoiler . |
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03-30-2006, 05:03 PM
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Location: Los Angeles
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It's a vacuum assist. If you hold the brake in while you start the car, you should feel the vacuum kicking in. Also, if you don't feel a difference after several applications of the pedal on a long incline (with the engine turned off), then I'd look for a vacuum failure/leak.
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Jack Olsen 1972 911 My new video about my garage. • A video from German TV about my 911 |
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03-30-2006, 05:04 PM
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I don't feel any drop in pedal, I'll have to try again. If i am showing no boost, what are the trouble shooting steps?
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86 Carrera Targa - Garnet Red Metallic 88 928 S4 - Gran Prix White |
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03-30-2006, 05:04 PM
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Sun's Out! I'm Drivin' It!
Speed Wagon
1987 Porsche 3.2 Carrera Coupe 3.2
