[T3] On my 73 square , what should I look at on the breather with a PCV

William Jahn willjahn975 at gmail.com
Wed Sep 11 09:47:37 PDT 2019

I don't know of anyone here who has a D-jet testor . To add Ray works on
VW  T-4 so perhaps the ECU is different. I would imagine the temp sensors
would be wired the same way. Also on a 73 T-3 with the EGR uses pin 14 on
the ECU for the EGR so the TPS 14 and 17 daisy chain through the EGR relay
to the ECU . I removed the relay since it no longer has the EGR valve > I
just left it connected yet it ran fine then , did notice on none Calif 72
and all earlier systems 14 is not used they place 14 from the TPS including
the 5 pin models to ground on the case half ground trees.

On Wed, Sep 11, 2019 at 7:46 AM Jim Adney <jadney at vwtype3.org> wrote:

> On 10 Sep 2019 at 13:32, Phil Ostronic wrote:
> > Any chance the change when connecting the air temp sensor is due to
> > miswiring at some point?  Normally itTMs a mild effect but you get large
> > symptoms. Maybe you should warm it up then pull the ecu and take your
> > resistance measurements from the 25-pin MPC and not at the other ends of
> > the wires to be sure?  Maybe disconnect the sensor and read if that wire
> > has proper continuity and no odd shorts. Just thinking outside the box...
> That would be a really good thing to do, but it's really, really hard and
> time
> consuming to do with just a VOM/DVM in hand.
> I wonder if he could find someone in his area who has one of the Bosch
> D-jet
> testers. Those make all these tests, AND they make them quick and easy.
> It's just 15 minutes to get the brain out, 15 minutes, or less, to run the
> tests,
> and 15 more to reinstall the brain. Of course, if problems are found, add
> the
> time to correct them.
> --
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
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