Ok, thanks Joel.

I do suspect my aux air regulator - as the van doesn't start really great
when it's cold.

I'' hafta look at Bentley, something about squeezing a hose etc and
listening for the rev change. I also read somewhere something about
servicing the valve, lubing it with w-d 40 or something.

I guess 2 years is long enough for 1 air cleaner element. Time for a new
one.

Marshall
----- Original Message -----
From: "Joel Walker" <jwalker17@earthlink.net>
To: "Marshall" <mjruskin@SHAW.CA>
Sent: Sunday, May 05, 2002 03:27 PM
Subject: Re: Remedy requested for Suspected "rich-running" 1.9

> > 1.    Is the 1.9 always supposed to run very rich at start-up? ( I
> think it is, because the O2 isn't warmed up - so I can't see how the
> "richness of mixture" could be controlled at start-up)
>
> yup. all fuel injection engines smell rich for the first few minutes.
> it's built into their programming.
>
> > 2.    If I replace my tempII sensor, will this reduce richness, and
> improve mpg? (currently quite poor)
>
> couldn't hurt. :)
>
> > 3.    Can a vaccuum leak cause richness and poor fuel economy?
> (remember I do have excellent drivability)
>
> no, vacuum leaking will add air to the mixture, making it leaner (more
> air to fuel in ratio) and causes burned pistons. what could be
> happening is that the aux air regulator is NOT allowing extra air, and
> the mixture stays too rich (not enough air). could also be a dirty air
> filter (not enough air).
>
> good luck!
> joel
> >
> > Thanks,
> >
> > Marshall Ruskin
> > 84 Westy
> >
> >
> >
> >
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