[T3] Question about D jet idle issues 73 T3

[Keith Park]

what gas are you running?  What part of the country, what elevation?

Keith


Topnotch Restorations
topnotch at nycap.rr.com
http://www.a383ina68.addr.com/radiorest/main.htm
71 Squareback  "Hothe"
65 Notchback  "El Baja Rojo"
93 RX7  "Redstur"
87 Golf  "Winterat"
 
-----Original Message-----
From: type3-vwtype3.org [mailto:type3-vwtype3.org-bounces at lists.vwtype3.org]
On Behalf Of William J
Sent: Tuesday, January 26, 2016 5:54 PM
To: type3-vwtype3.org at lists.vwtype3.org
Subject: [T3] Question about D jet idle issues 73 T3

Has anyone run across issues with an unstable idle that clears up with the
IAD temp sensor is unplugged ? It only shows up when there is no load auto
trans in park engine warmed up . If I give it gas from 900 RPM idle speed
and watch the tach for lack of a better term it seems to stuggle until it
reaches 2000 RPM. 

 I first noticed this when I opened the tail gate with it warm and runing I
could hear an erratic miss out the exhaust , it's not one cylinder . Also if
I am driving say 30 MPH and let off the gas quick I hear a slight popping
out the exhaust. 

 The only thing that seems to cure this is to unplug the IAD temp sensor . I
assume it is running lean. 

 It has all the proper E system parts and I have not found a vacuum leak so
far. With the IAD temp sensor connected and driving under load it seems fine
other than the popping . 

 It has the electric AAR which does close although it s eems to take longer
to close that  it used to. I just changed the MAP to a NOS Bosch #  0 280
100 116. It holds vacuum and the resistence is within spec. Compared to the
old one with the temp sensor plugged in it's better yet still stuggles with
no load . My voltage is 14.3 at 1500 RPM. I don't have access to read the
actual mixture I am just going by the way it acts. 

William

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