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Date:         Sun, 22 Dec 2002 11:15:16 -0500
Reply-To:     kdlewis@JUNO.COM
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Ken Lewis <kdlewis@JUNO.COM>
Subject:      Re: 2.1L hesitation at low RPM.....
Comments: To: mrvolkswagen@HOTMAIL.COM
Content-Type: text/plain; charset=us-ascii

Chris; It would be helpful to know what the O2 sensor is doing during all this. My "guess" is a grounding problem between the engine and the chassis or ECU. The faulty connection is producing an extra voltage which is adding or subtracting with the output of the O2 sensor. This produces a erroneous value for the fuel management system to base it's calculations on. There is some more info on O2 sensors on my web site.

Good Luck and Drive Safely Ken Lewis 86 Crewcab, 60 356 T-5 http://Neksiwel.20m.com/

On Sat, 21 Dec 2002 12:37:38 -0500 Chris S <mrvolkswagen@HOTMAIL.COM> writes: > Hello all, > > My friend's '89 Westy will pull cleanly from 1000 RPM with the > oxygen sensor unplugged. With the oxygen sensor plugged in the > engine hesitates and does not have as much power until maybe above > 3000 RPM and it seems to rev a lot more quickly. The problem was > worse before O2 sensor replacement to the point that the van would > buck and make driving up hills difficult. > > Any ideas, oh wise list? I searched the archives but did see > anything that fits his problem. > > Thanks, > > Chris S. > '85 Westy > www.knology.net/~vw/ > >

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