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Date:         Thu, 17 Jun 2004 12:32:03 -0500
Reply-To:     John Rodgers <jh_rodgers@BELLSOUTH.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         John Rodgers <jh_rodgers@BELLSOUTH.NET>
Subject:      Re: Cold idle mystery
Comments: To: "Mike D." <md03@XOCHI.COM>
In-Reply-To:  <p06110412bcf65204c2d0@[10.0.1.202]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Check the crankcase vent breather hose on top of the engine. It connects from the round thingy on top to the AFM. Mine rotted, had a hole underneath, and I had the same symptoms as yours. Replaced hose, problem disappeared. Check all your vacumn lines.

Regards,

John Rodgers 88 GL Driver

Mike D. wrote:

> Ok, time to put on your thinking caps. Can anyone solve this by > sheer brain power alone? > > Details: > 1985 1.9l Westy w/Auto Trans and Air Conditioning > 145k miles > Compression fair (around 120-125 each cylinder) > Recently replaced Digital Idle Stabilizer > Recently replaced AFM > Timing @ 5BTDC > > Symptoms: > > When warm runs fine. Get 17-18mpg on the highway @ 65mph, so I don't > think there is any gross mechanical problem with the engine or > mis-tuning. > > When cold (60F), it starts right up, but quickly (either immediately, > or within a minute or two) the idle is rough and the engine will die > when in Drive, and sometimes even when in Neutral. I have to keep > one foot lightly on the accelerator to keep it from stalling. Within > about 10 minutes of driving, the problem goes away. > > I've tried setting the idle higher when cold (with a few turns of the > idle adjustment screw). This solves the stalling problem when cold, > but then when the van is warm, the idle is way too high (1500+ rpm). > > I've gone through the Bently and done most of the electrical digijet > diagnostics (resistances of temp senders when cold and hot, etc.) > without finding anything amiss. > > Ideas? >


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