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

William Jahn willjahn975 at gmail.com
Tue Sep 10 10:16:43 PDT 2019

Last I brought this up due to the low MPG it seemed rich and I am not sure
it's rich. The fuel pump does draw more amp's than the ECU which include
the pump and electric AAR yet the fuel pressure is set at 30 PSI , I used
to set it at 28.I did replace the pump with a 2 port pump and it draws less
than the original 3 port Bosch. I can't seem to find any issues with either
temp sensor other than the head temp at the same ambient varies 400 ohms so
it's not consistent.

 As I stated before I've read an open air temp sensor richens the mix by
10% across the board. If true it's running lean. I haven't checked the
voltage at the two voltage supply leads from the power relay to the ECU.

 Something has changed and I can't seem to figure out what it is.

On Tue, Sep 10, 2019 at 5:58 AM Jim Adney <jadney at vwtype3.org> wrote:

> On 9 Sep 2019 at 16:06, William Jahn wrote:
> > Any suggestions on what I should look for and do? I don't think it's
> > affecting the fuel to air mix yet anything is possible. I know the PCV
> has
> > been NLA for a good long time.
> How about checking the voltage drop across the fuel pump relay while the
> engine is running? That's the same part as used for the main power relay
> and if it had also developed a problem, that would reduce the power to the
> pump, possibly leading to low fuel pressure and lean running.
> The PCV valve is easy to remove and clean, but they very seldom get so
> gunked up that it's a problem. You'll never need a new one.
> --
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
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