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Date:         Wed, 28 Nov 2007 23:25:42 -0800
Reply-To:     Scott Daniel - Shazam <scottdaniel@TURBOVANS.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Scott Daniel - Shazam <scottdaniel@TURBOVANS.COM>
Subject:      Re: Changed thermostat - temp gauge still reads stone cold
Comments: To: Allan Streib <streib@CS.INDIANA.EDU>
In-Reply-To:  <C46E44B0-A178-4F6A-972C-879CA0EFC939@cs.indiana.edu>
Content-Type: text/plain; charset="us-ascii"

This post reminded me................. And time there is gage weirdness, consider the Voltage stabilizer in the dash - a small gizmo, about the size of a thumbnail. Mounts with one screw.

Fixed a lot of dash and gauge weirdness replacing those.

If you went black & white, from not starting well cold, to starting well cold, and that's the only thing you did, replace the ecu temp sensor, then that musta been it.

I've never bothered, but it would be great to have a resistor to just flip a switch for, and it would replace the ecu temp sensor - , sort of an emergency default resistance reading, for testing reasons and troubleshooting. I've always wanted to wire in a redundant fuel pump too , but haven't ever needed to. I do like the idea of readily being able to switch in some value that will take sensors out of the picture temporarily. I love understanding things well enough to be able to trick them to work my way, when I say.

-----Original Message----- From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Allan Streib Sent: Wednesday, November 28, 2007 9:19 PM To: vanagon@GERRY.VANAGON.COM Subject: Re: Changed thermostat - temp gauge still reads stone cold

On Nov 29, 2007, at 12:05 AM, syncro.carboncow wrote:

> I would disagree. Good for a couple of > years? They often go 15+ in our vanagons > before failure!

Well maybe I had a string of bad ones. I owned my Jetta for about 10 years, and in that time I replaced the ECU sensor at least three times and the gauge sensor twice. The failure modes were very low reading on the dash gauge even with the engine fully warm, or very hard starting of a cold engine but a warm engine would start easily. In my PERSONAL experience the sensors are a definite weak point.

> Again I've talked to the sources and > although the failure of a new sensor is > not impossible it is uncommon.

I missed that part of the thread; I agree if the sensor has recently been replaced it's POSSIBLE, but not likely, that the new one has already failed.

Allan


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