Date: Thu, 28 Jul 2011 23:39:20 -0500
Reply-To: Peter Lapp <carrothospital@GOOGLEMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Peter Lapp <carrothospital@GOOGLEMAIL.COM>
Subject: Re: Oxygen sensor woes
In-Reply-To: <CAG33NXHcNpcTJcErNJer6Ra3S_4jqusq6i6N2R=nkMbpxTHEhg@mail.gmail.com>
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Interesting, Thanks for the input. I hadn't heard of that before. Mine
didn't hunt much before I changed the o2 and exhaust, but you could still be
right about that. Unfortunately, I'm still getting loss of power sometimes
during initial acceleration. Not sure what that's about. I heard sometimes
the green coax wire for the o2 sensor can ground out. I tested mine and it
seemed ok. I put a new female connector on it, just to be safe, but I still
have the issue. Hmmm....
On Thu, Jul 28, 2011 at 11:15 PM, Bill Gibson (III)
<bill.bgibson@gmail.com>wrote:
> I'm no expert, and that's an understatement. But, I've been told my '84
> will "hunt" for the best idle if the O2 sensor is working, as you note in
> the voltage fluctuation, but if not, the system will use a "default" mix
> that doesn't change. This is because it is an early version of digitally
> controlled fuel injection.
>
>
> On Thu, Jul 28, 2011 at 7:58 PM, Peter Lapp <carrothospital@googlemail.com
> > wrote:
>
>> So, no takers yet? I just bought another brand new oxy sensor, same one,
>> and
>> tested it. I got the same results. Any ideas on why this is? It still runs
>> fine with the sensor unplugged.
>>
>>
>> On Thu, Jul 28, 2011 at 7:27 AM, Peter Lapp
>> <carrothospital@googlemail.com>wrote:
>>
>> > Hey all,
>> >
>> > I recently purchased and installed the stainless steel exhaust from
>> Rocky
>> > Mountain Westy. I also got a brand new 3-wire oxy sensor to go with it.
>> > Well, I brought it out for it's first test ride afterwards and there was
>> > some weird hesitation and roaming idle. I took it home and thought that
>> > maybe I was an idiot and forgot to remove the plastic protective cap
>> from
>> > the sensor before installing it. That doesn't seem to be the case now,
>> > because the cap covers the threads of the sensor too, and I know those
>> > weren't covered when I installed.
>> >
>> > If I unplug the sensor, it works great. If I plug it in, the hesitation
>> is
>> > gone now, but the idle is not completely stable. It's not all over the
>> > place, but if you watch the needle, you can see it jump up and down just
>> a
>> > hair. I hooked up a voltmeter to the signal wire with the heater wires
>> > connected. With the signal wire connected and the voltmeter on it, it
>> will
>> > be at .45v, then if I give it gas, it will steadly climb. After I
>> removed
>> > the gas and let it sit for a little idling, it started jumping between
>> .1
>> > and .7v, which I think it what it's supposed to do.
>> > With the wire disconnected and a voltmeter on it, it would start at 0
>> volts
>> > and would climb indefinitely when I gave it gas. I'd have to try it
>> again
>> > and check the numbers.
>> >
>> > Does anyone know how to correctly test the sensor? I figured maybe it
>> could
>> > be defective. It's part #13957. If someone could help me get this
>> figured
>> > out, it would be much appreciated. Maybe I had this issue all along, but
>> my
>> > leaky exhaust hid it. Maybe now with a fully working exhaust it's just
>> > rearing it's head.
>> > Thanks a lot!
>> >
>> > -p
>> >
>>
>
>
>
> --
> Bill Gibson
> Tempe, Arizona, USA
>
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