Date:         Thu, 27 Oct 2005 12:56:07 -0700
Reply-To:     John Bange <jbange@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         John Bange <jbange@GMAIL.COM>
Subject:      Re: Air-Fuel Ratio fluctuation
In-Reply-To:  <016a01c5db1e$d708ff00$1f08010a@NewHomeHub>
Content-Type: text/plain; charset=ISO-8859-1

> a spike like that is almost always an ignition miss. If the cylinder
> misfires, the O2 goes to the exhaust where it's interpreted as lean, when
> in
> fact the A/F is unchanged.
>

Aha...and the light bulb goes on over my head! If there's no spark, there's
no combustion. No combustion, none of the O2 gets used up-- thus the
atmospheric O2 reading. It all seems perfectly obvious now!
Cap-rotor-plugs are new but the plug wires are old and crappy. They're my
primary suspect, as I never checked them. I bet I find one's bad and the
others not far behind. Time for new ones anyway. I should've changed them
with everything else.
--
John Bange
'90 Vanagon
"We'd tell a monkey how to peel a banana, if he said he was peeling one in a
Vanagon."