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Date:         Sat, 12 Feb 2000 12:00:25 EST
Reply-To:     kenneth d lewis <kdlewis@JUNO.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         kenneth d lewis <kdlewis@JUNO.COM>
Subject:      Re: Hesitation
Comments: To: RAlanen@aol.com

Frank; This scenario is quite plausible. While the O2 sensor is plugged in the ECU is running in "closed loop". Obviously it is in "open loop" when unplugged. Each type of fuel management is governed by different guidelines. Closed loop strives for fuel economy while open loop is more a "limp home" mode and fuel economy is not a priority. My first guess as to the malfunction is the TEMPII sensor is out of tolerance at operating temperature. After that the AFM of throttle body or its adjustment. Keep us informed as to what you find.

Drive Safely & Good Luck Ken Lewis <Kernersville,NC> 86 VW crewcab;60 356B Coupe --------------------------------------------------

On Sat, 12 Feb 2000 07:32:34 EST RAlanen@AOL.COM writes: > Same story on my '87 Westy. Been like that since I installed the >new oxy >sensor, generic Bosch, from The Bus Depot. Unplug the black single >lead and >the engine has no hesitation but does seem to consume more gas. Plug >in the >black wire and the hesitation comes back. I also have the idle >surging >problem and have not tracked the cause of that yet either. So I have >no >solution to offer up here, just confirmation of the same symptoms. I >have >not had time yet to do a full check of the throttle body switch, the >idle >stbilizer valve, the idle stablizer control, air flow meter & harness >or the >oxy sensor to see if any of thse items are out of spec and the cause >of the >hesitation problem and surging idle problem. I may get on it this >week and >try to figure it out. I'll report back my findings when I get them. >All >these electronic gadget just bug me, and I know a bit about looking >into them >! I can just imagine what someone who doesn't have a clue about all >this >electronic stuff has to go through to get these problems solved. Good >luck ! > >Cheers > >Frank Condelli >'87 Westy & Lionel Trains >Almonte, On >Visit me on the web.......> <A >HREF="http://members.aol.com/RAlanen/index.html">Frank, Rita & April's >Website ></A>

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