<div dir="ltr">I know about the separate contact for the idle position 17 as well as the 2 separate tracks 9 & 20 and ground 12/47 . Then there is 2/14 connected through the 2 wiper sliding contact which is the center contact of the switch built into the plastic arm which has a (floating) switch which fits the throttle shaft of the IAD . This switch at idle " the separate contact" or when the throttle is closing connects 2/14 to 17 on opening the throttle that switch then connects 2/14 to either 9 or 20 depending on throttle position which offers the injector pulse at a certain point near end of travel is WOT . Also 12/47 is always ground as it is connected on the board trace to 2/14 . I only brought up the 20 clicks not as an adjustment method , just to check as I open the throttle all 20 enrichment pulses exist. I adjusted using the throttle fully closed as the stop or starting point not the welded stop in the TPS since the throttle plate must be fully closed then make sure with leads on 9 & 12 that slight throttle open 2 degrees I have contact to 20 & 12 . The 2 degrees seems to be the movement of the floating contact or switch and then the wiper is just into the gap off the idle position pad and close to moving onto 9 of the zig zag . <div><br></div><div> I think I understand why you wanted me to plug in the IAD temp sensor and unplug the TPS . My take is that floating switch may be slightly off or still on idle when it should be completing the contact to 20 and 12 as well as the position of the wiper coming off the idle pad . </div><div><br></div><div> You said "<span style="font-size:12.8px">There's a separate contact for the idle position. That's the one you use to </span><br style="font-size:12.8px"><span style="font-size:12.8px">adjust the TPS." I assume you are talking about the 2 position switch as well as the wipers position as they both work together .</span></div><div><span style="font-size:12.8px"><br></span></div><div><span style="font-size:12.8px"> To be honest decades ago when all I had was the Bentley and did it as described it worked because if I was off just a bit thinking I could improve something the car would not idle well at all, it would if I recall sort of surge or rise and fall yet didn't have that insane popping I get now with the temp sensor connected . I still want to try what you suggested just to see what happens. </span></div><div><span style="font-size:12.8px"><br></span></div><div><span style="font-size:12.8px"> I recall telling you a while back how a person who worked for Porsche told me to bend the stop tab one fine day when I was setting the TPS . His thought was bend the stop so the wiper was near coming off the idle pad then rotate the marks on the TPS 2 degrees on the scale . If I recall before this the stop tab was set so the wiper was further back on the idle pad further away from the small gap on the board. I have 2 of these 73 TPS units only difference is one was a wire contact in that switch and the one one the car has a wider flat copper contact. </span></div><div><span style="font-size:12.8px"><br></span></div><div><span style="font-size:12.8px">William<br></span><div><br><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div></div></div></div><div id="DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br>
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</table><a href="#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2" width="1" height="1"></a></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Jul 21, 2018 at 7:25 AM, Jim Adney <span dir="ltr"><<a href="mailto:jadney@vwtype3.org" target="_blank">jadney@vwtype3.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On 20 Jul 2018 at 20:15, willjahn wrote:<br>
<br>
> I hear 20 clicks key on and the<br>
> first click is just at when the throttle moves<br>
<br>
</span>This may not be correct. Note that the adjustment of the TPS is done across <br>
a different pair of pins than those which give you the multiple clicks. Go back <br>
and look at the instructions again. Do not adjust the TPS by the clicks you <br>
can hear with the key ON.<br>
<br>
There's a separate contact for the idle position. That's the one you use to <br>
adjust the TPS.<br>
<br>
Note that the instructions in the Bentley for adjusting the TPS are incorrect <br>
for '70-73 cars. They are correct for '68-9 only.<br>
<div class="HOEnZb"><div class="h5"><br>
-- <br>
******************************<wbr>*<br>
Jim Adney, <a href="mailto:jadney@vwtype3.org">jadney@vwtype3.org</a><br>
Madison, Wisconsin, USA<br>
******************************<wbr>*<br>
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