Marshall, my 1.9 is fully tuned up, runs better than it ever has, but it
runs rich on start up, particularly if van has been in hot sun all day and
outside air temp is above 75 deg. F

John Lauterbach
Macon, GA
'84 7-passenger with 1.9L engine

----- Original Message -----
From: "Marshall" <mjruskin@SHAW.CA>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Sunday, May 05, 2002 3:02 PM
Subject: Remedy requested for Suspected "rich-running" 1.9

> Hi Volks:
>
> My neighbour was beside my van when I started it - and he commented on how
incredibly rich the exhaust smelled.
>
> The drivability, FWIW, is excellent. Starts great and runs great. When
it's warm out, I just turn the key and it starts. When it's cold out,
requires partial throttle to start.
>
> On the digitool, it does seem that the O2 sensor is working well - at
least, when the van is warmed up.
>
> I have a new rotor, cap, fuel filter and spark-plug wires.
>
> Questions:
>
> 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)
>
> 2.    If I replace my tempII sensor, will this reduce richness, and
improve mpg? (currently quite poor)
>
> 3.    Can a vaccuum leak cause richness and poor fuel economy? (remember I
do have excellent drivability)
>
> Thanks,
>
> Marshall Ruskin
> 84 Westy
>
>
>
>
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