[T3] Air Pressure Sensor Update

[Keith Park]

Another thing to keep in mind about Ray, he doesnt know that
the TYPE 3 E version of D jet (72-3 T3) even EXISTS.

Keith


Topnotch Restorations
topnotch at nycap.rr.om
http://www.a383ina68.addr.com/radiorest/main.htm
71 Squareback  "Hothe"
65 Squareback  "Eggcrate"
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 Jim Adney
Sent: Tuesday, November 25, 2014 2:05 PM
To: type3 at vwtype3.org
Subject: Re: [T3] Air Pressure Sensor Update

On 25 Nov 2014 at 8:43, Chris Sheridan wrote:

> Hi, I too had my distrib rebuilt, etc, etc. and am experiencing horrible
> stumbling missing at idle in my FI automatic. What is the 'E' sensor you
> speak of? Whatever it is, I need one. Also I was reading Ray Greenwoods
> stuff on the Samba list and he states that our D-Jetronic connectors were
> only supposed to be accurate for maximum 12 plug/unplug cycles? This makes
> mine 4,000 times out of spec.

The E pressure sensor is for '72-3 and his car is a '73. I believe 
you have a '71 which requires the C version.

Ray is more than a bit over the top in his opinions, nevertheless, 
there is a problem with the connectors to the injectors. At some 
point, well after our cars were out of production, Bosch changed the 
thickness of the male pins in their replacement injectors. The later 
pins are just a few thousandths of an inch thinner, but this makes a 
difference. If your injectors have ever been replaced, it's likely 
that the connectors no longer make good contact.

One thing I have to do whenever I first check out a car is check the 
resistances thru the injectors, including the connection resistance. 
Measuring from the brain connector to ground, thru each injector, you 
should get ~3 Ohms or less. Measure it while gently moving the 
connector. If you see any sign of an intermittant connection, you 
need to fix it.

To fix these is a royal pain. You have to remove each female pin from 
the connector body, squeeze them slightly, test the bare female pin 
on the injector, the install back in the connector body. Doing this 
for all 8 injector connector pins can take 2-3 hours.

With the exception of connectors which have been brutalized, I've 
never seen any problems with any of the other FI connectors.

-- 
*******************************
Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
*******************************

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