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Date:         Tue, 15 Apr 1997 10:19:09 -0500
Sender:       Vanagon Mailing List <vanagon@vanagon.com>
From:         Karl_G_Vochatzer@notes.amrcorp.com
Subject:      Re: It's a mystery

Chris,

Since you're already in the replace parts mode, go ahead and replace the coolant temp sensor in the thermo housing. It's only $12 and the round gasket $1 to $1.50. It may be the likely candidate since you noticed the change with it disconnected. There are numerous posts on this little item in the archives on installing it.

Basically, disconnect electronic connector and the horseshoe shaped pin that keeps the sensor in the housing, have new sensor with new gasket on and lubed with a little coolant ready in your left hand, pull the old sensor out with the right hand and quickly insert new sensor into hole that will be spilling out coolant (have rags, newspaper, bucket, towel, etc. ready below the area for catching any wayward coolant). Be fast and only do this when the engine is cold! If you were fast you shouldn't have to bleed the coolant system; the 2.1 seems to burp itself ok for small amounts of air. I did open the bleeder valve on top of the thermo housing for a brief second while it was running to see if there was any air. None found.

Good luck, Karl 88 GL

AMead11278@aol.com on 04/14/97 08:04:18 PM

Please respond to AMead11278@aol.com

To: vanagon@lenti.med.umn.edu cc: (bcc: Karl G Vochatzer/AMR) Subject: It's a mystery

Hello all, I am stumped and I hope someone on this list can help me. My problem is with my 86 vanagon. At start up the engine runs fine but deteriorates to a rough idle after it is warmed up. I don't notice any problem while driving, only at idle. I found that if I disconnect the coolant temp sensor for the fuel injection system (simulating a cold engine) it runs well. So far, I have replaced the spark plugs, wires, coil, cap, rotor,and oxygen sensor. I have tested other components of the FI system, all check out fine. Have any of you experienced this problem with your vanagons? Any help, comments, or advice on solving this annoying little problem would be geatly appreciated.

Chris 86 vanagon


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