George Goff said:
> In a message dated 4/20/04 6:27:29 AM,
> kdlewis_wasting_time@ACCESS4LESS.NET
> writes:
>
> << If your just looking to fill the hole you could put one of my O2 sensor
>
> monitors in it.
>
> http://neksiwel.20m.com/photo5.html >>
>
> The need for this type of instrumentation escapes me.  What puzzles me
> more
> is the wisdom of tagging an unqualified conductor onto the end of a unique
> shielded input to the ECU then routing it to the front of the van.  It
> becomes one
> more fly in the ointment.  In other words, if the van starts running like
> a
> pig, first disconnect the O2 sensor monitor before troubleshooting.
>
> George
>

I have used a similar air/fuel ratio monitor to fine-tune my air flow
meter (AFM).  It is a very useful instrument; although I think of it more
as a tool rather than something to permanently mount.

I used shielded wire of course, grounded at the engine side.  By fine
tuning the AFM I have improved cold running especially in the 1500-3000
RPM range.  When warm the slight hesitation in that region is now gone
too.

Also I was able to quickly see that the ECU would not enter closed loop
mode even with a new O2 sensor.  The fault was a broken O2 wire right as
it entered the connector for the ECU.

Some shops use an oscilloscope to view the O2 sensor voltage; Ken's device
will perform a similar function but allow you to monitor it while driving.

Ryan