Date: Thu, 11 Sep 2008 13:53:04 -0700
Reply-To: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject: Re: Question about temp II sensor and bad running
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the test for how well your 02 sensor is working takes but a minute or two..
super easy to do.
Just connect a digital voltmeter to the signal wire, ( while leaving the 02
signal wire still connected into the system...........)
engine idling and warmed up. You'd like to see swinging voltage from
perhaps .4 volts to .8 volts......
something like that.
if it doesn't swing over a very large range, or swings pretty slowly, that's
a lazy 02.
If it sits at one voltage, it's dead.
This simple check could/should be part of any regular checking or inspecting
of the engine, its settings and tune up parts, and so forth.
and I find that tune up parts barely, barely wear on waterboxers engines.
Like they have to be pretty bad before they start affecting how it runs.
----- Original Message -----
From: "Jack R." <jack007@COMCAST.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, September 11, 2008 12:27 PM
Subject: Re: Question about temp II sensor and bad running
> What a great exercise!!! We all felt your pain, and relief!
>
> Glad you tracked it down to an O2 Sensor. It is BEST to replace, gas
> mileage, motor running too rich or lean, etc. Don't go too long without
> it.
>
> Now, if I can remember this when my 02 Sensor fails!
> Too bad we don't have "Check Engine" lights on our vans.
>
> Jack
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> Jim Felder
> Sent: Thursday, September 11, 2008 3:00 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Question about temp II sensor and bad running
>
> And the loser is.... the oxygen sensor and the winners are those who
> suggested that I remove it from the loop.
>
> I just went for a five minute test drive and the van drove great.
>
> Now, what's the downside of running without an O2 sensor? There must
> be one. Mileage?
>
> I think I even have a good one somewhere. I usually replace them every
> couple of years but I never knew why. I do now! The last one I took
> out is probably good and I think I saved it. In the time it takes to
> find one or buy a new one, I wanted to know if there is a danger in
> driving with it disconnected.
>
> Jim
>
> On Thu, Sep 11, 2008 at 1:46 PM, Jim Felder <jim.felder@gmail.com> wrote:
>> OK, here's the news: I just went out and tried it again and it
>> stumbled to a stall in about a minute.
>>
>> Then I disconnected the O2 sensor. It ran strongly for five minutes or
>> so, longer than at any other time today. Then while it was running, I
>> plugged it back in and it was dead in 30 seconds.
>>
>> I will try to repeat this again in a few minutes to confirm what I
>> think just happened.
>>
>> Jim
>>
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