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Date:         Fri, 28 May 2004 16:04:13 -0400
Reply-To:     David Brodbeck <gull@GULL.US>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Brodbeck <gull@GULL.US>
Subject:      Re: TSII info
Comments: To: Michael Rule <mikerule@UFL.EDU>
In-Reply-To:  <1847211592.1085737617710.JavaMail.osg@spnode33>
Content-Type: TEXT/PLAIN; charset=US-ASCII

On Fri, 28 May 2004, Michael Rule wrote:

> HI Hans (and anyone In The Know), > > Can you help me out please and give me an idea of what the TSII > does? Might help in the future if my basic trouble-shooting > skills offer no help in the fuel-delivery department!

It measures the engine temperature. The ECU uses this information to provide a richer mixture when the engine is cold.

If it fails shorted, the engine won't fire when cold.

If it fails open, the engine will start fine when cold but will flood out and die when it warms up.

On my aircooled bus, I worked around a bad Temp II sender for a while by disconnecting the wire when it was cold, then grounding it when it warmed up a bit. I've heard since that it's better to connect it through a test light than to just ground it, to leave a little resistance in the circuit.

It's amazing how suddenly an aircooled engine with an open Temp II sender will die when it gets warmed up. I had it cut out at 55 mph like I'd turned off the switch.

David Brodbeck, N8SRE '86 Volvo 240DL wagon '82 VW Vanagon Westfalia Diesel


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