> At 06:44 PM 2/3/2001, Mark Keller wrote: > >.8 volt or higher, weak vane > >spring setting, malfunctioning fuel pressure regulator too high system > >pressure, Or too lean .3 volts malfunction of fuel pressure to low or a > >poorly adjusted afm wiper. > > Voltage = oxygen present = too lean. IOW this is backwards. I still > question whether having an open-loop reading that's not in the middle of > the range is reason to begin fiddling in the absence of other indications > (smells rich, poor mileage, Rome burning... I dunno). > > david > David, I think Mark's right on this point. According to the Bosch F.I. manual sold by Bentley (pp. 21-23): The O2 sensor generates a voltage directly related to the *difference* in O2 content between the ambient(outside) air and the exhaust stream. Lean -> more O2 in exhaust -> less voltage produced. I was forced to learn a little about this when my previous vanagon ('84) failed the IL emissions test. Turned out there was a crack on the underside of one of the hoses connected to the intake. Watch out for those vacuum leaks! Larry A. Chicago 91 GL |
Please note - During the past 17 years of operation, several gigabytes of
Vanagon mail messages have been archived. Searching the entire collection
will take up to five minutes to complete. Please be patient!
Return to the archives @ gerry.vanagon.com
The vanagon mailing list archives are copyright (c) 1994-2011, and may not be reproduced without the express written permission of the list administrators. Posting messages to this mailing list grants a license to the mailing list administrators to reproduce the message in a compilation, either printed or electronic. All compilations will be not-for-profit, with any excess proceeds going to the Vanagon mailing list.
Any profits from list compilations go exclusively towards the management and operation of the Vanagon mailing list and vanagon mailing list web site.