[T3] On my 73 square

[William Jahn]

Yes Ray has been pressing me to adjust the MPS for years now. It took me
over a year to try to tell him the MPS on a 72/73 does not have the full
load enrichment he kept claiming late T-3's had the MPS with full load when
it does not, he deals mainly with T-4's and that's a different deal. The
ones with the full load don't look anything alike other than the plug end .

 Before I do anything I need to be certain there is not a wiring issue I
missed or a voltage drop to the ECU. I realize a voltage drop whether
because of the charging system of the power relay or the ECU connector will
result in running rich. Since the only thing that seems to clear up the
idle is TS1 and unplugged does make it richer then I am lean just lean
enough TS1 compensates for it. It drives fine with it unplugged , I don't
know what the mix is through the RPM range yet it has good pick up and
speed and doesn't miss.

On Sun, Sep 15, 2019 at 9:25 AM Jim Adney <jadney at vwtype3.org> wrote:

> On 14 Sep 2019 at 20:24, bobsnotch at aol.com wrote:
>
> > However, I don't know IF adjusting the MPS will fix your "miss at idle"
> > issue.
>
> That's the problem. In most cases, the pressure sensor is not the problem,
> and "adjusting" it just means that you've now lost the factory
> calibration. Yes,
> you can mess with it, and a lot of people do. SOME of those people really
> know what they're doing and do it with real understanding, but just
> adjusting
> one part, to make up for a problem you don't understand, is the gateway to
> chaos.
>
> Most people who do this end up either junking the car, installing carbs,
> or
> just running extremely rich and fouling the air.
>
> It's not an approach I would ever recommend.
>
> --
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
>
> _______________________________________________
> VWType3.Org mailing list - type3 at vwtype3.org
> To unsubscribe or change subscription options, visit:
> http://lists.vwtype3.org/listinfo.cgi/type3-vwtype3.org
> If you need more help, contact: gregm at vwtype3.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.vwtype3.org/pipermail/type3-vwtype3.org/attachments/20190915/850b4697/attachment.html>