 servicing vacuum actuated parts, do these need/benefit from any kind of service? |
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| 914 RZ-1 |
 Jul 14 2017, 10:55 AM
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Porsche Padawan  Group: Members Posts: 682 Joined: 17-December 14 From: Santa Clarita, CA Member No.: 18,230 Region Association: Southern California  |
My car sat for 20 years in a garage. It now runs and drives, but I'm wondering if any of the vacuum-actuated parts (TPS, etc) could benefit from any kind of service. I'm wondering if the seals or other parts on these components need to be checked for sticking/rot/losing elasticity. I've replaced a few of the other seals on the car (fuel gauge seal, some vacuum hoses, fuel hoses, etc). I'm just concerned about the ones I can't see.
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| 914 RZ-1 |
Jul 21 2017, 03:04 PM
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Porsche Padawan Group: Members Posts: 682 Joined: 17-December 14 From: Santa Clarita, CA Member No.: 18,230 Region Association: Southern California |
No responses?! Is this a stupid question that even a newbie like me should know? Are these parts just not serviceable? Can they be overhauled? I've been told they either work or they don't but I thought it might be possible to overhaul them. I can pull a vacuum on them with vacuum pump and see if they hold the vacuum, but then what if they don't? Some of these parts are NLA or are very expensive. Thought I'd see if they can be serviced.
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| Mueller |
Jul 21 2017, 03:56 PM
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#3
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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Tps is mechanical. It has wipers that wear. If you have d-jet you will have an MPS that has a bellows that fails after some time. There are procedures online that show how to test and calibrate.
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| TheCabinetmaker |
Jul 21 2017, 04:06 PM
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#4
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
Hmm, vacuum operated parts? Mps, distributor advance/retard, decel valve. Nothing there to service that I can think of. Probably different with an ljet
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