<div dir="ltr">My '69 FI/AT 1600 never seems to vary more than about 50 rpm? <br></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Dec 9, 2017 at 11:28 AM, William J <span dir="ltr"><<a href="mailto:catnine09@dslextreme.com" target="_blank">catnine09@dslextreme.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I think it's possible and even probable .<br>
<br>
There is just one detail I wanted to add. I just want to stress one point. I don't recall if I brought this up about when I start the car cold well before the ping thing . The AAR would be open , the idle would be set at 950 , in a minute the idle would rise to 1500 RPM and once in reverse drop back down . As soon as I placed it back in park it would hang at 1500 for a while. And not to dwell on the unplugged air temp sensor . I just drove it today and last Thursday with the sensor un plugged and it no longer does this. From what I understand The AAR is only to allow air to bypass the closed throttle plate and the MPS senses this adding more fuel . It's not supposed to increase the RPM that much perhaps a bit yet not 550 RPM's higher than the set base idle . Since it rises so much it in fact advances the timing which it will because of the RPM increase . What it does now is start and run at 950 and basically holds that even in drive only with a short drop when I shift it into drive or reverse and once warm the idle drops to 850 and seems to remain there in drive then in park rises to 950. About a year ago it would have the 1500 RPM right away and if I let it idle it would stay there for a good 15 to 20 minutes then drop to the 950 and begin the erratic miss.<br>
<br>
I only bring this up not to debate what percentage the air temp sensor richens the mix only because doing this changes the way it runs so much . I have read this was an old techs trick on Rennlist I think . On the other end and only by a few people on Samba I am told to adjust the MPS . My thinking is not to mess with the MPS I feel it just work as is . It does not leak and the 2 readings 90 ohm and 350 ohms are when they should be and it's the proper one for my E system..<br>
<br>
I do agree with a long drive yet based just on what the sensor does and it's not just the idle that smooths out it runs better as I drive it. Once I pulled the Dist that was sticking and installed the AH and timed it it lost a bit of pickup that came back with the sensor unplugged. I imagine there is some difference between the two distibutors advanc curve. Yet this did not fix the erratic miss that remained the same.<br>
<br>
Do I look for a vacuum leak?<br>
<br>
I am just trying to find out why this is. I'd rather run rich than lean for obvious reasons.<br>
----- Original Message ----- From: "Jim Adney" <<a href="mailto:jadney@vwtype3.org" target="_blank">jadney@vwtype3.org</a>><br>
To: <<a href="mailto:type3@vwtype3.org" target="_blank">type3@vwtype3.org</a>><br>
Sent: Saturday, December 09, 2017 5:10 AM<span class="im HOEnZb"><br>
Subject: Re: [T3] On a 73 T-3 SB fuel injected aut trans pinging .<br>
<br>
<br>
</span><div class="HOEnZb"><div class="h5"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On 9 Dec 2017 at 11:18, Dave Hall wrote:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I wonder if all this is the car's way of asking you to take it for a good<br>
drive. Unless I'm mixing up two listees, this car isn't driven very far at<br>
all.<br>
I've certainly heard of VW dealers resorting to a good brisk drive in a<br>
'grumbling' car that does minimal mileage, just to clear out the 'soot'.<br>
Now the advance is working better, maybe that's worth trying?<br>
</blockquote>
<br>
Yes, I'll second that. William has said he never gets the car above 45 mi/hr,<br>
so let's see what a couple hours at 65-70 does.<br>
<br>
-- <br>
******************************<wbr>*<br>
Jim Adney, <a href="mailto:jadney@vwtype3.org" target="_blank">jadney@vwtype3.org</a><br>
Madison, Wisconsin, USA<br>
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