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Date:         Mon, 28 Jan 2002 13:19:36 -0500
Reply-To:     "Beckham, Chip" <cbeckham@NORDSON.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         "Beckham, Chip" <cbeckham@NORDSON.COM>
Subject:      Re: COLD WEATHER STUTTERING
Content-Type: text/plain; charset="iso-8859-1"

John,

I have an 85 GL Weekender and had a similar problem. Admittedly, it doesn't get as cold in Atlanta as Anchorage, but my problem was definitely cold weather related. My engine would stutter and occasionally cut out completely in cold weather operation (freezing level and below). It always restarted immediately. The one time I drove in single-digit temperatures, the problem was bad.

The problem got worse last winter when the van stranded me a couple of times. The engine would just quit. One telltale sign was the tachometer would always drop to zero. Immediate attempts at restarting were futile. Two local VW shops came up empty, as the engine would always start perfectly when dead cold. I was finally able to duplicate the problem at a repair shop. They traced it to faulty Hall Effect sensor on the ignition circuit. Replacing this component solved my problem.

Chip Beckham Atlanta, Georgia 85 Vanagon GL 85 Mercedes 300D

-----Original Message----- From: Cooper John LCDR ALCOM/J322 [mailto:John.Cooper@ELMENDORF.AF.MIL] Sent: Monday, January 28, 2002 12:45 PM To: vanagon@GERRY.VANAGON.COM 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


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