Don

        How did you end up dealing with the Ground ~ It should, I believe, be taken

care of through the Body of the O2Snsr being in contact with the ExhaustSystem ~

But I choose not to trust that as the Joints&Bolts in that Path tend to get Crudded

over time, so I ScrewClamp a wire to the O2SnsrBody & attach the other end to a

Good BodyGroundPoint ~

                                                        ORR ~ DeanB

On 30 Oct , 2014, at 10:34 AM, Don Hanson wrote:

> I run digifant engine management for my inline VW ABA Jetta motored
> vanagon...same as the stock Vanagons but with the inline motor providing
> the go..A few weeks ago I had some problems with my engine management
> system and traced it to a dysfunctional Oxygen sensor.    I'm almost
> positive the problems were a result of bad wiring between the O2 sensor and
> the ECU, but I have no actual confirmation of that.
> 
>   Anyhow, I was unhappy with the cost of replacing the Bosch 3-wire heated
> Oxygen sensor in my rig...the best I could find was about $70 for another
> Bosch heated sensor, and  that one didn't even have the proper plug for my
> wiring harness...So I did some research, called around a bit and
> asked...and the general response was that I could replace that 3 wire
> heated oxygen sensor with the single wire Bosch sensor and save myself
> about $50 without any real downside to engine performance.  But......No one
> would actually come right out and tell me that.   Lotta "Oh, that should be
> OKs"...and "I don't see any reason why that wouldn't work fine"s....There
> was also some nebulous opinion as to how to properly connect the
> sensor...Should the shielded wire loom carry a grounding connection or
> not...etc...
> 
>   Anyhow I bought a single wire Bosch from Van Cafe and installed it.
> The results are quite satisfactory.   The only downside has been that after
> sustained highway driving if you shut off the motor for a short while the
> idle speed is a little low...low enough to stall sometimes...for just a
> couple of seconds, until the O2 sensor gathers enough heat to resume proper
> function, I guess.
> 
>   I have regained my fuel economy...back up to 24.xx mpg after 3000 miles
> with the new sensor. the O2 sensor i again modulating the fuel mix
> properly....When running with the O2 sensor disconnected from the ECU, I
> was seeing around 4-6mpg less gas mileage but the motor felt quite happy
> and strong..
> 
>   So, in my case, I successfully saved some money on that part and gained
> back my good gas mileage.   Here's a handy app to help you track your
> fuel...there's one for the smart phones, too....
> http://www.fuelly.com/dashboard