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Date:         Thu, 6 Jan 2000 18:51:54 -0500
Reply-To:     David Beierl <dbeierl@IBM.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@IBM.NET>
Subject:      Re: hi/low idling on '87 2.1L
Comments: To: Richard C Welsh <welshcu@PB.COM>
In-Reply-To:  <8525685E.007F85B6.00@lndanmta01.pb.com>
Content-Type: text/plain; charset="us-ascii"; format=flowed

At 18:12 1/6/00 , Richard C Welsh wrote: >throttle housing). i took the cover off mine last night and it looks like >there's a palstic cam with two lobes attached to the throttle shaft. there's >also a tiny switch nearby, but not close enough to be actuated by the cam. >Hmm....is there a missing piece here? is mine out of adjustment? what does >this throttle valve swich do anyway?

This switch signals closed-throttle and wide-open-throttle to the ECU. It must be actuated at both those positions. If it fails to close at idle, the symptom will be that the engine will die whenever the rpm gets above maybe 1500, then restart as the revs drop down around 1000. If that's what you're calling a loping idle, then you have found the cause. Adjustment is covered in Bentley (mine unavailable right now) but I'm sure someone will fill you in. It's critical and ticklish and (I'm told) a pain. I have the earlier '84 setup which uses two switches and is much easier to adjust.

david David Beierl - Providence, RI http://pws.prserv.net/synergy/Vanagon/ '84 Westy "Dutiful Passage" '85 GL "Poor Relation"


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