[T3] On my 73 square

William Jahn willjahn975 at gmail.com
Mon Sep 16 10:03:00 PDT 2019

It wouldn't hurt to have a spare. This is why I brought up the one from the
72 I kept it just in case. I have no idea what was changed in the 048. I
can't find any info other than what ECU is for what year system. I still
need to check several things , mainly the voltage at the ECU to see what it
actually is and the wires from TS1 just in case Pin # 1 wire has an issue
somewhere that I missed.

 I've been trying to think why before TS1 is even close to warm 5 minutes
max and at that point it should still at high resistance cause the idle to
be rich since it works just like TS2. From what I've read if open it's rich
, shorted it's lean yet the short does not have to be the sensor could be
the wiring which would be pin 1 since pin 13 is the ground for TS1. If pin
1 was not making good contact at the ECU then unplugging with change
nothing unless that pin has high resistance or the wire is shorted. High
resistance would seem to cause it not to lean out if it was high enough so
that can't be it . The only thing that to me makes sense it the wire is
shorted since if it was not making contact I would not see a change
unplugging it. All the later systems used the same TS1 the ones that read
air temp not oil temp. I do recall in 2009 plugging it the 72 ECU and got
the same affect unplugging TS1 so either both brains have the same internal
issue or there is a short. what are the odds?

 I don't think there is a fuel pressure issue since it will do over 70 MPH
and never bogs or acts like it's running out of fuel , the pump is new the
filter is new gas will pour out the tank outlet so the tank is not plugged

 I'm just trying to think what might be causing this so I can narrow it
down and look for the most logical part of the system to look at.

 Since it's my only car I have to use the car so we have food and what ever
else to allow me at least a few days to test it out. If I had another car
this would not be an issue.

 Let me know about the brain , right now it will take a while before I have
the funds to get it.

On Mon, Sep 16, 2019 at 6:38 AM Jim Adney <jadney at vwtype3.org> wrote:

> On 15 Sep 2019 at 15:14, William Jahn wrote:
> >  I certainly hope it's not the ECU sounds like an expensive replacement
> > if I can even find one known to be good.
> I should be able to come up with a good one here for $50 plus $20 shipping.
> --
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
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