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> Throttle position switch (TPS) repair, Contact surfaces are worn
ericread
post Feb 18 2010, 08:41 AM
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QUOTE(davesprinkle @ Feb 17 2010, 08:52 PM) *


Eric, the switch is designed with hysteresis (backlash) so that contact C is shorted either to post A OR to post B, but never to both simultaneously. In this way, the ECU can detect an opening throttle vs. a closing throttle.

But here is the problem with your TPS -- you've got a 2.0 liter board mounted in a 1.7 liter sensor plate. The 1.7 liter throttle rotates the opposite direction, so your mismatched sensor will never detect idle.


That would make sense. Thanks!

Eric
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hushpuppy
post Sep 21 2018, 06:57 PM
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dave,
do you still have any of the boards left 75 2.0 thanks,
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jagalyn
post Sep 26 2018, 08:17 PM
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QUOTE(hushpuppy @ Sep 21 2018, 04:57 PM) *

dave,
do you still have any of the boards left 75 2.0 thanks,



https://900designs.zoeysite.com/index.php/c...n-sensor-board/
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worn
post Sep 27 2018, 01:28 AM
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QUOTE(r_towle @ Jun 15 2009, 04:11 PM) *

Isnt that gold?
Could gold leafbe applied tofix the groove?
Even silver solder might work?

Rich

Good idea, but gold leaf is generally applied with some varnish as glue. Conduction might be a problem. True silver solder melts at a temp that would vaporize the board. Plating is certainly an option as long as you hav3 a thin film of metal to go on. I have used cars well products a lot and they offer gold and silver kits. Hmmm.

Whoops. Thought they we’re gone because I didn’t check the dates of the posts.
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Tbrown4x4
post Sep 27 2018, 02:44 AM
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914Rubber has the boards in stock.

Oops. I didn't see jagalyn's link.
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ChrisFoley
post Sep 27 2018, 06:37 AM
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QUOTE(jagalyn @ Sep 26 2018, 10:17 PM) *

QUOTE(hushpuppy @ Sep 21 2018, 04:57 PM) *

dave,
do you still have any of the boards left 75 2.0 thanks,



https://900designs.zoeysite.com/index.php/c...n-sensor-board/

So why does the part listing for a 2.0L TPS board have a description for a 1.7L car?
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jagalyn
post Sep 27 2018, 07:14 AM
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https://shop.914rubber.com/Porsche-914-Thro...m?categoryId=-1

https://www.ebay.com/itm/Porsche-2-0-Thrott...-YAAOSwSdFZe6Om
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Mikey914
post Sep 29 2018, 10:31 PM
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QUOTE(ChrisFoley @ Sep 27 2018, 05:37 AM) *

QUOTE(jagalyn @ Sep 26 2018, 10:17 PM) *

QUOTE(hushpuppy @ Sep 21 2018, 04:57 PM) *

dave,
do you still have any of the boards left 75 2.0 thanks,



https://900designs.zoeysite.com/index.php/c...n-sensor-board/

So why does the part listing for a 2.0L TPS board have a description for a 1.7L car?

Because we screwed the pooch. Sorry about that. It is indeed for the 2.0. We will get that fixed.
Thx
Mark
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davesprinkle
post Sep 30 2018, 01:11 AM
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QUOTE(hushpuppy @ Sep 21 2018, 05:57 PM) *

dave,
do you still have any of the boards left 75 2.0 thanks,

Yes, I've still got boards available for the late 1.7 liter cars and for the 2.0 liter cars. You can PM me if you're interested.

I'm aware that 914rubber is also manufacturing these.
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