I have to disagree. A bad pressure regulator knocked my mileage down to
about 10.

John Flaherty
'84 GL Insufficient Funds

----- Original Message -----
From: "John Philcox" <jphilcox@HOME.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, March 22, 2001 8:01 AM
Subject: Re: fuel pressure regultor bad? Engine running rich

> I doubt this would cause that much of a problem.  My fuel regulator was
> totally blocked, fuel pressure was around 90 psi.  My gas mileage dropped
to
> about 17 mpg.  Sounds like at least one of the major signals (O2, Temp2,
> AFM, etc.), is not getting back to the ECU properly.  Did you check the
> signals at the ECU plug, and check all the ground connections?
>
> ----- Original Message -----
> From: "John Clemens" <jbclem@EARTHLINK.NET>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Wednesday, March 21, 2001 6:51 PM
> Subject: fuel pressure regultor bad? Engine running rich
>
>
> > I have a 1983 watercooled and my gas milleage is down to 10 mph, my
> air/fuel
> > ratio is between 9 and10(should be 14.7).  The only spec I've found so
far
> > that is off is the fuel pressure reading.  It is .5 Bar(aprox 7 psi) too
> > high at idle, both with the fuel pressure regulator vac line on and
> > off(actual reading 2.5 Bar and 3.0 Bar).  I've also checked with the
fuel
> > return line disconnected(to make sure a restriction wasn't causing this
> > problem), and the fuel pressure is still .5 Bar too high.
> >
> > My question is whether .5 Bar(7 psi) is enough of a different to make
the
> > engine(1.9L) run  so rich.
> >
> > I'd appreciate any ideas or suggestions about this problem.
> >
> > John