I just received the boards for the late 1.7liter cars. (Please note that these boards will not work on the early 1.7 cars. Completely different switches.) Sorry that this has taken so long. Here's a pic:

Dave, this is all great stuff! Awesome engineering, planning, and implementation, too!

One other suggestion I would recommend to people who are replacing their TPS boards, and to owners who have board that are still working well, is to consider using a contact lubricant to reduce wear on the wiping trace. Two products are Deoxit D-5 and Stabilant 22. Both should extend the life of the TPS by reducing trace wear.

Note that because most of the wear happens near the start of the trace, because this is the area where you spend most of the time at part-load with a small throttle opening, while cruising.

Dave, I'll update my parts page with info on your board replacement.

Mines a March 1973 1.7l, would this be correct for your new tps? Mine is filthy, so If correct I would love one..

Please let me know... rodsrugs(at)me.com

Yes, this board will work for your car.

Dave, could you add something in the Member Vendor forum? You'll probably sell more.

Hello, I'm interested in your circuit board. I live in Vancouver and work in Portland
(Gladstone to be exact) please reply and I can give my contact info!
thank you, John

[quote name='davesprinkle' date='Jun 15 2009, 05:14 PM' post='1181084']
I have a board house manufacturing these circuit boards right now. I expect the shipment on 22 June 09.
[/quote
I'd like to purchase a few of your boards.Are they still available?Do you have a 2 liter version?

Yes, I've got boards available for both the 2.0liter and late 1.7liter cars. $35/each. Send me a PM to discuss purchasing.

I purchased and installed the new TPS, but I'l having some difficulty in adjustment. Using the following adjustment guide, I tried to perform as directed:

Click to view attachment

But I just can't seem to get the Ohm Meter to go to zero.

Now, please take a look at my TPS:

Click to view attachment

Should the wires "C" between post "A" and post "B" always short between these posts, or is there an offset where the wire only either contacts post "A" or post "B", but never both at the same time?

In looking at my TPS, can you see anything else which my be causing my problems?

I drive a 1974 2.0L stock FI engine.

My thanks in advance.

Eric Read

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

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

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

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.

914Rubber has the boards in stock.

Oops. I didn't see jagalyn's link.

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

https://shop.914rubber.com/Porsche-914-Thro...m?categoryId=-1

https://www.ebay.com/itm/Porsche-2-0-Thrott...-YAAOSwSdFZe6Om

Because we screwed the pooch. Sorry about that. It is indeed for the 2.0. We will get that fixed.
Thx
Mark

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.