John
I would try adding some gas line antifreeze next time the temp drops. I
would be questioning the range of effectiveness of the oxygenated gas and
even it's consistancy. But , I'm no expert.
Doug
www.shirewood.com
'84 weekender

----- Original Message -----
From: "Cooper John LCDR ALCOM/J322" <John.Cooper@ELMENDORF.AF.MIL>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, January 28, 2002 9:45 AM
Subject: COLD WEATHER STUTTERING

> I am located in Anchorage Alaska, and have an 87 Syncro Westy with a cold.
> When the temperature drops into the single digits, the engine hesitates
and
> stutters.  It seems to be worse AFTER the engine warms up, and the problem
> intensifies at around 3500 rpm.  I have replaced the T2 sensor.  I also
ran
> about four tanks of Chevron Supreme through it, and thought I had it
> licked...  until the temperature dropped again.  The gas up here is
> "oxygenated" with ethanol, so we have a built in gas dry supply.  This
> weekend, the temp dropped below zero and the hesitation returned.  Sunday
> the temperature was back up into the "balmy teens" and the hesitation quit
> again.  No problems starting, even at the lowest temperature, and this
> without any type of pan heater.  Any ideas?  I am thinking this is fuel
> system related, either the fuel pump or perhaps pressure regulator.
> Something that doesn't warm up significantly with the engine. I have tried
> searching the archives, but can't zero in on anything that fits.  Thanks,
> John
>