Getting closer to solving rich running (long)

[Brandon Rogers]

I did not solder them - I used butt/crimp connectors most likely - it
was a few years ago....

Brandon


-----Original Message-----
From: Bernie Benz [mailto:b.benz at charter.net] 
Sent: Monday, February 18, 2008 11:39 AM
To: Brandon Rogers
Cc: 200q20V mailing list
Subject: Re: Getting closer to solving rich running (long)


Brandon,

How did you splice the universal O2 sensor wires to the old harness  
connector wires? Good crimp connections should work but the Ni wire  
will not soft solder. I used silver solder, with no problems.

Bernie


On Feb 18, 2008, at 10:16 AM, Brandon Rogers wrote:

> Guys -
> So this weekend I did some more checking.  As a quick reminder the car
> has a very rich exhaust at idle - I _think_ it is fine under load.   
> The
> car did pass Colorado's rolling road emissions - which makes this more

> perplexing.  Car has been "rich" (according to my nose and my stinky 
> clothes after driving it) for a few years....
>
> Ok so here's that info.
>
> Drove the car for a while - fully up to temp - pulled into garage -
> rich
> exhaust stinking up the place -
> engaged ProDiag.  No codes - but pulled up the MBlocks:
>
> 1.  Idle Stabilizer Characteristic Control Curve reads 57 (spec is
> 41-55)
> 2.  O2 Adaptation reads 174 (spec is 115-141)
>
> Shut down.
>
> Wait a good hour - pull the two "motor" fuses for about 30 seconds (to

> clear adaptations), turn to "on" for 20 seconds, then start.  Let run 
> for a few minutes but no driving - O2 Sensor Control stays at 128 for 
> about 2 minutes then after a few minutes:
>
> 1.  O2 Sensor Control occasionally climbed as high as 144 (spec is
> 123-133) then would go back down
> 2.  O2 Adaptation goes as high as 142+/- but generally stays in spec -

> although on the high end
>
> Last night I pulled the fuses again to make sure I had pulled them
> long
> enough to re-set the adaptation tables.  Did not start car tho.
>
> This AM drove car  - ended up bringing it back home as a nice boost
> leak
> reared its head about 5 minutes from home - but I still hooked up the
> ProDiag - NO codes - and on Mblocks:
>
> 1. Idle stabilizer in spec -
> 2.  O2 adaptation at 142 - just out of spec (115-141) - this may
> not be
> reliable due to leak - but that was only audible at 10 psi+ - so??
>
> Maybe being on the high end of spec it runs rich enough to smell but 
> still pass Emissions?????????
>
> As for 02 Sensors - - I've used 2 - one of which was a new universal I

> spliced into the old harness - and I _think_ the other was a new OE
> with
> connectors.  I could never tell a difference between the two.
>
> Big question is why is O2 sensor adaptation out of spec?  Bad O2
> sensor
> (both sensors????)?  Bad something else?  I did try a bone stock  
> ECU and
> it seemed to be no different according to my nose - however I did not
> pull the MBlocks with it.
>
> Thanks-
>
> Brandon
>
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